Finding the Fourth Proportional to 866,786.67, 1,196,142.59 and 479,591.99

Step by Step Solution

1. Step 1: Write the proportion equation
   866,786.67 : 1,196,142.59 = 479,591.99 : x
2. Step 2: Convert to fraction form
   866,786.67/1,196,142.59 = 479,591.99/x
3. Step 3: Cross multiply
   866,786.67x = 1,196,142.59 × 479,591.99
4. Step 4: Simplify right side
   866,786.67x = 573,660,405,061.85
5. Step 5: Solve for x
   x = 573,660,405,061.85/866,786.67
6. Step 6: Final answer
   x = 661,824.21