Finding the Fourth Proportional to 65,167.72, 89,939.04 and 39,689.02

Step by Step Solution

1. Step 1: Write the proportion equation
   65,167.72 : 89,939.04 = 39,689.02 : x
2. Step 2: Convert to fraction form
   65,167.72/89,939.04 = 39,689.02/x
3. Step 3: Cross multiply
   65,167.72x = 89,939.04 × 39,689.02
4. Step 4: Simplify right side
   65,167.72x = 3,569,592,357.34
5. Step 5: Solve for x
   x = 3,569,592,357.34/65,167.72
6. Step 6: Final answer
   x = 54,775.47