Finding the Fourth Proportional to 144,145.28, 216,128.42 and 59,964.42

Step by Step Solution

1. Step 1: Write the proportion equation
   144,145.28 : 216,128.42 = 59,964.42 : x
2. Step 2: Convert to fraction form
   144,145.28/216,128.42 = 59,964.42/x
3. Step 3: Cross multiply
   144,145.28x = 216,128.42 × 59,964.42
4. Step 4: Simplify right side
   144,145.28x = 12,960,015,350.82
5. Step 5: Solve for x
   x = 12,960,015,350.82/144,145.28
6. Step 6: Final answer
   x = 89,909.40