Finding the Fourth Proportional to 529,849.15, 731,196.72 and 288,134.01

Step by Step Solution

1. Step 1: Write the proportion equation
   529,849.15 : 731,196.72 = 288,134.01 : x
2. Step 2: Convert to fraction form
   529,849.15/731,196.72 = 288,134.01/x
3. Step 3: Cross multiply
   529,849.15x = 731,196.72 × 288,134.01
4. Step 4: Simplify right side
   529,849.15x = 210,682,643,032.45
5. Step 5: Solve for x
   x = 210,682,643,032.45/529,849.15
6. Step 6: Final answer
   x = 397,627.60