Finding the Fourth Proportional to 80,123.99, 120,130.56 and 57,648.51

Step by Step Solution

1. Step 1: Write the proportion equation
   80,123.99 : 120,130.56 = 57,648.51 : x
2. Step 2: Convert to fraction form
   80,123.99/120,130.56 = 57,648.51/x
3. Step 3: Cross multiply
   80,123.99x = 120,130.56 × 57,648.51
4. Step 4: Simplify right side
   80,123.99x = 6,925,347,789.47
5. Step 5: Solve for x
   x = 6,925,347,789.47/80,123.99
6. Step 6: Final answer
   x = 86,432.89