Finding the Fourth Proportional to 900,759.60, 1,242,875.61 and 513,567.72

Step by Step Solution

1. Step 1: Write the proportion equation
   900,759.60 : 1,242,875.61 = 513,567.72 : x
2. Step 2: Convert to fraction form
   900,759.60/1,242,875.61 = 513,567.72/x
3. Step 3: Cross multiply
   900,759.60x = 1,242,875.61 × 513,567.72
4. Step 4: Simplify right side
   900,759.60x = 638,300,793,271.31
5. Step 5: Solve for x
   x = 638,300,793,271.31/900,759.60
6. Step 6: Final answer
   x = 708,625.02