Finding the Fourth Proportional to 66,377.27, 91,558.79 and 39,499.72

Step by Step Solution

1. Step 1: Write the proportion equation
   66,377.27 : 91,558.79 = 39,499.72 : x
2. Step 2: Convert to fraction form
   66,377.27/91,558.79 = 39,499.72/x
3. Step 3: Cross multiply
   66,377.27x = 91,558.79 × 39,499.72
4. Step 4: Simplify right side
   66,377.27x = 3,616,546,290.27
5. Step 5: Solve for x
   x = 3,616,546,290.27/66,377.27
6. Step 6: Final answer
   x = 54,484.71