Finding the Fourth Proportional to 316,061.91, 474,341.96 and 138,691.35

Step by Step Solution

1. Step 1: Write the proportion equation
   316,061.91 : 474,341.96 = 138,691.35 : x
2. Step 2: Convert to fraction form
   316,061.91/474,341.96 = 138,691.35/x
3. Step 3: Cross multiply
   316,061.91x = 474,341.96 × 138,691.35
4. Step 4: Simplify right side
   316,061.91x = 65,787,126,100.59
5. Step 5: Solve for x
   x = 65,787,126,100.59/316,061.91
6. Step 6: Final answer
   x = 208,146.33