Finding the Fourth Proportional to 1,186,390,440.96, 1,778,339,931.59 and 399,170,792.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,186,390,440.96 : 1,778,339,931.59 = 399,170,792.06 : x
2. Step 2: Convert to fraction form
   1,186,390,440.96/1,778,339,931.59 = 399,170,792.06/x
3. Step 3: Cross multiply
   1,186,390,440.96x = 1,778,339,931.59 × 399,170,792.06
4. Step 4: Simplify right side
   1,186,390,440.96x = 709,861,359,039,931,776
5. Step 5: Solve for x
   x = 709,861,359,039,931,776/1,186,390,440.96
6. Step 6: Final answer
   x = 598,337,052.06