Finding the Fourth Proportional to 2,128,540.80, 2,937,413.52 and 1,257,404.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128,540.80 : 2,937,413.52 = 1,257,404.16 : x
2. Step 2: Convert to fraction form
   2,128,540.80/2,937,413.52 = 1,257,404.16/x
3. Step 3: Cross multiply
   2,128,540.80x = 2,937,413.52 × 1,257,404.16
4. Step 4: Simplify right side
   2,128,540.80x = 3,693,515,979,688.24
5. Step 5: Solve for x
   x = 3,693,515,979,688.24/2,128,540.80
6. Step 6: Final answer
   x = 1,735,233.82