Finding the Fourth Proportional to 751,142.72, 1,036,011.52 and 521,700.31

Step by Step Solution

1. Step 1: Write the proportion equation
   751,142.72 : 1,036,011.52 = 521,700.31 : x
2. Step 2: Convert to fraction form
   751,142.72/1,036,011.52 = 521,700.31/x
3. Step 3: Cross multiply
   751,142.72x = 1,036,011.52 × 521,700.31
4. Step 4: Simplify right side
   751,142.72x = 540,487,531,147.57
5. Step 5: Solve for x
   x = 540,487,531,147.57/751,142.72
6. Step 6: Final answer
   x = 719,553.71