Finding the Fourth Proportional to 1,227,570.55, 1,838,245.43 and 978,738.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,227,570.55 : 1,838,245.43 = 978,738.55 : x
2. Step 2: Convert to fraction form
   1,227,570.55/1,838,245.43 = 978,738.55/x
3. Step 3: Cross multiply
   1,227,570.55x = 1,838,245.43 × 978,738.55
4. Step 4: Simplify right side
   1,227,570.55x = 1,799,161,661,808.63
5. Step 5: Solve for x
   x = 1,799,161,661,808.63/1,227,570.55
6. Step 6: Final answer
   x = 1,465,627.91