Finding the Fourth Proportional to 89,128.68, 133,693.02 and 42,356.04

Step by Step Solution

1. Step 1: Write the proportion equation
   89,128.68 : 133,693.02 = 42,356.04 : x
2. Step 2: Convert to fraction form
   89,128.68/133,693.02 = 42,356.04/x
3. Step 3: Cross multiply
   89,128.68x = 133,693.02 × 42,356.04
4. Step 4: Simplify right side
   89,128.68x = 5,662,706,902.84
5. Step 5: Solve for x
   x = 5,662,706,902.84/89,128.68
6. Step 6: Final answer
   x = 63,534.06