Finding the Fourth Proportional to 89,388.10, 134,111.28 and 42,634.90

Step by Step Solution

1. Step 1: Write the proportion equation
   89,388.10 : 134,111.28 = 42,634.90 : x
2. Step 2: Convert to fraction form
   89,388.10/134,111.28 = 42,634.90/x
3. Step 3: Cross multiply
   89,388.10x = 134,111.28 × 42,634.90
4. Step 4: Simplify right side
   89,388.10x = 5,717,821,011.67
5. Step 5: Solve for x
   x = 5,717,821,011.67/89,388.10
6. Step 6: Final answer
   x = 63,966.24