Finding the Fourth Proportional to 265,381.29, 398,149.58 and 85,462.72

Step by Step Solution

1. Step 1: Write the proportion equation
   265,381.29 : 398,149.58 = 85,462.72 : x
2. Step 2: Convert to fraction form
   265,381.29/398,149.58 = 85,462.72/x
3. Step 3: Cross multiply
   265,381.29x = 398,149.58 × 85,462.72
4. Step 4: Simplify right side
   265,381.29x = 34,026,945,931.01
5. Step 5: Solve for x
   x = 34,026,945,931.01/265,381.29
6. Step 6: Final answer
   x = 128,219.09