Finding the Fourth Proportional to 85,440.82, 128,141.52 and 25,457.08

Step by Step Solution

1. Step 1: Write the proportion equation
   85,440.82 : 128,141.52 = 25,457.08 : x
2. Step 2: Convert to fraction form
   85,440.82/128,141.52 = 25,457.08/x
3. Step 3: Cross multiply
   85,440.82x = 128,141.52 × 25,457.08
4. Step 4: Simplify right side
   85,440.82x = 3,262,108,925.96
5. Step 5: Solve for x
   x = 3,262,108,925.96/85,440.82
6. Step 6: Final answer
   x = 38,179.75