Finding the Fourth Proportional to 66,038.72, 91,139.72 and 37,738.92

Step by Step Solution

1. Step 1: Write the proportion equation
   66,038.72 : 91,139.72 = 37,738.92 : x
2. Step 2: Convert to fraction form
   66,038.72/91,139.72 = 37,738.92/x
3. Step 3: Cross multiply
   66,038.72x = 91,139.72 × 37,738.92
4. Step 4: Simplify right side
   66,038.72x = 3,439,514,601.90
5. Step 5: Solve for x
   x = 3,439,514,601.90/66,038.72
6. Step 6: Final answer
   x = 52,083.30