Finding the Fourth Proportional to 66,401.18, 91,630.10 and 38,105

Step by Step Solution

1. Step 1: Write the proportion equation
   66,401.18 : 91,630.10 = 38,105 : x
2. Step 2: Convert to fraction form
   66,401.18/91,630.10 = 38,105/x
3. Step 3: Cross multiply
   66,401.18x = 91,630.10 × 38,105
4. Step 4: Simplify right side
   66,401.18x = 3,491,564,769.98
5. Step 5: Solve for x
   x = 3,491,564,769.98/66,401.18
6. Step 6: Final answer
   x = 52,582.87