Finding the Fourth Proportional to 90,456.42, 135,688.89 and 74,632.13

Step by Step Solution

1. Step 1: Write the proportion equation
   90,456.42 : 135,688.89 = 74,632.13 : x
2. Step 2: Convert to fraction form
   90,456.42/135,688.89 = 74,632.13/x
3. Step 3: Cross multiply
   90,456.42x = 135,688.89 × 74,632.13
4. Step 4: Simplify right side
   90,456.42x = 10,126,750,199.59
5. Step 5: Solve for x
   x = 10,126,750,199.59/90,456.42
6. Step 6: Final answer
   x = 111,951.70