Finding the Fourth Proportional to 76,932.31, 106,168.78 and 42,940.10

Step by Step Solution

1. Step 1: Write the proportion equation
   76,932.31 : 106,168.78 = 42,940.10 : x
2. Step 2: Convert to fraction form
   76,932.31/106,168.78 = 42,940.10/x
3. Step 3: Cross multiply
   76,932.31x = 106,168.78 × 42,940.10
4. Step 4: Simplify right side
   76,932.31x = 4,558,898,030.08
5. Step 5: Solve for x
   x = 4,558,898,030.08/76,932.31
6. Step 6: Final answer
   x = 59,258.56