Finding the Fourth Proportional to 85,861.02, 128,835.27 and 39,107.82

Step by Step Solution

1. Step 1: Write the proportion equation
   85,861.02 : 128,835.27 = 39,107.82 : x
2. Step 2: Convert to fraction form
   85,861.02/128,835.27 = 39,107.82/x
3. Step 3: Cross multiply
   85,861.02x = 128,835.27 × 39,107.82
4. Step 4: Simplify right side
   85,861.02x = 5,038,466,548.81
5. Step 5: Solve for x
   x = 5,038,466,548.81/85,861.02
6. Step 6: Final answer
   x = 58,681.65