Finding the Fourth Proportional to 66,496.72, 91,752.92 and 39,641.72

Step by Step Solution

1. Step 1: Write the proportion equation
   66,496.72 : 91,752.92 = 39,641.72 : x
2. Step 2: Convert to fraction form
   66,496.72/91,752.92 = 39,641.72/x
3. Step 3: Cross multiply
   66,496.72x = 91,752.92 × 39,641.72
4. Step 4: Simplify right side
   66,496.72x = 3,637,243,563.82
5. Step 5: Solve for x
   x = 3,637,243,563.82/66,496.72
6. Step 6: Final answer
   x = 54,698.09