Finding the Fourth Proportional to 529,410.72, 730,585.30 and 287,693.34

Step by Step Solution

1. Step 1: Write the proportion equation
   529,410.72 : 730,585.30 = 287,693.34 : x
2. Step 2: Convert to fraction form
   529,410.72/730,585.30 = 287,693.34/x
3. Step 3: Cross multiply
   529,410.72x = 730,585.30 × 287,693.34
4. Step 4: Simplify right side
   529,410.72x = 210,184,525,111.90
5. Step 5: Solve for x
   x = 210,184,525,111.90/529,410.72
6. Step 6: Final answer
   x = 397,016.00