Finding the Fourth Proportional to 316,931.16, 475,426.98 and 89,226.12

Step by Step Solution

1. Step 1: Write the proportion equation
   316,931.16 : 475,426.98 = 89,226.12 : x
2. Step 2: Convert to fraction form
   316,931.16/475,426.98 = 89,226.12/x
3. Step 3: Cross multiply
   316,931.16x = 475,426.98 × 89,226.12
4. Step 4: Simplify right side
   316,931.16x = 42,420,504,768.72
5. Step 5: Solve for x
   x = 42,420,504,768.72/316,931.16
6. Step 6: Final answer
   x = 133,847.69