Finding the Fourth Proportional to 66,485.18, 91,748.61 and 38,191.10

Step by Step Solution

1. Step 1: Write the proportion equation
   66,485.18 : 91,748.61 = 38,191.10 : x
2. Step 2: Convert to fraction form
   66,485.18/91,748.61 = 38,191.10/x
3. Step 3: Cross multiply
   66,485.18x = 91,748.61 × 38,191.10
4. Step 4: Simplify right side
   66,485.18x = 3,503,980,339.37
5. Step 5: Solve for x
   x = 3,503,980,339.37/66,485.18
6. Step 6: Final answer
   x = 52,703.18