Finding the Fourth Proportional to 85,606.52, 128,460.56 and 38,858.72

Step by Step Solution

1. Step 1: Write the proportion equation
   85,606.52 : 128,460.56 = 38,858.72 : x
2. Step 2: Convert to fraction form
   85,606.52/128,460.56 = 38,858.72/x
3. Step 3: Cross multiply
   85,606.52x = 128,460.56 × 38,858.72
4. Step 4: Simplify right side
   85,606.52x = 4,991,812,932.08
5. Step 5: Solve for x
   x = 4,991,812,932.08/85,606.52
6. Step 6: Final answer
   x = 58,311.13