Finding the Fourth Proportional to 529,290.34, 730,411.69 and 287,576.72

Step by Step Solution

1. Step 1: Write the proportion equation
   529,290.34 : 730,411.69 = 287,576.72 : x
2. Step 2: Convert to fraction form
   529,290.34/730,411.69 = 287,576.72/x
3. Step 3: Cross multiply
   529,290.34x = 730,411.69 × 287,576.72
4. Step 4: Simplify right side
   529,290.34x = 210,049,398,059.86
5. Step 5: Solve for x
   x = 210,049,398,059.86/529,290.34
6. Step 6: Final answer
   x = 396,850.99