Finding the Fourth Proportional to 89,374.71, 133,857.87 and 42,660.39

Step by Step Solution

1. Step 1: Write the proportion equation
   89,374.71 : 133,857.87 = 42,660.39 : x
2. Step 2: Convert to fraction form
   89,374.71/133,857.87 = 42,660.39/x
3. Step 3: Cross multiply
   89,374.71x = 133,857.87 × 42,660.39
4. Step 4: Simplify right side
   89,374.71x = 5,710,428,938.77
5. Step 5: Solve for x
   x = 5,710,428,938.77/89,374.71
6. Step 6: Final answer
   x = 63,893.12