Finding the Fourth Proportional to 89,398.32, 134,126.64 and 42,645.12

Step by Step Solution

1. Step 1: Write the proportion equation
   89,398.32 : 134,126.64 = 42,645.12 : x
2. Step 2: Convert to fraction form
   89,398.32/134,126.64 = 42,645.12/x
3. Step 3: Cross multiply
   89,398.32x = 134,126.64 × 42,645.12
4. Step 4: Simplify right side
   89,398.32x = 5,719,846,658.00
5. Step 5: Solve for x
   x = 5,719,846,658.00/89,398.32
6. Step 6: Final answer
   x = 63,981.59