Finding the Fourth Proportional to 1,227,572.55, 1,838,248.42 and 978,740.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,227,572.55 : 1,838,248.42 = 978,740.55 : x
2. Step 2: Convert to fraction form
   1,227,572.55/1,838,248.42 = 978,740.55/x
3. Step 3: Cross multiply
   1,227,572.55x = 1,838,248.42 × 978,740.55
4. Step 4: Simplify right side
   1,227,572.55x = 1,799,168,269,627.43
5. Step 5: Solve for x
   x = 1,799,168,269,627.43/1,227,572.55
6. Step 6: Final answer
   x = 1,465,630.91