Finding the Fourth Proportional to 89,376.72, 133,860.87 and 42,662.40

Step by Step Solution

1. Step 1: Write the proportion equation
   89,376.72 : 133,860.87 = 42,662.40 : x
2. Step 2: Convert to fraction form
   89,376.72/133,860.87 = 42,662.40/x
3. Step 3: Cross multiply
   89,376.72x = 133,860.87 × 42,662.40
4. Step 4: Simplify right side
   89,376.72x = 5,710,825,980.29
5. Step 5: Solve for x
   x = 5,710,825,980.29/89,376.72
6. Step 6: Final answer
   x = 63,896.12