Finding the Fourth Proportional to 66,488.58, 91,741.71 and 39,633.59

Step by Step Solution

1. Step 1: Write the proportion equation
   66,488.58 : 91,741.71 = 39,633.59 : x
2. Step 2: Convert to fraction form
   66,488.58/91,741.71 = 39,633.59/x
3. Step 3: Cross multiply
   66,488.58x = 91,741.71 × 39,633.59
4. Step 4: Simplify right side
   66,488.58x = 3,636,052,861.33
5. Step 5: Solve for x
   x = 3,636,052,861.33/66,488.58
6. Step 6: Final answer
   x = 54,686.88