Finding the Fourth Proportional to 316,734.17, 475,131.42 and 89,029.20

Step by Step Solution

1. Step 1: Write the proportion equation
   316,734.17 : 475,131.42 = 89,029.20 : x
2. Step 2: Convert to fraction form
   316,734.17/475,131.42 = 89,029.20/x
3. Step 3: Cross multiply
   316,734.17x = 475,131.42 × 89,029.20
4. Step 4: Simplify right side
   316,734.17x = 42,300,570,217.46
5. Step 5: Solve for x
   x = 42,300,570,217.46/316,734.17
6. Step 6: Final answer
   x = 133,552.28