Finding the Fourth Proportional to 144,015.78, 216,023.42 and 59,719.69

Step by Step Solution

1. Step 1: Write the proportion equation
   144,015.78 : 216,023.42 = 59,719.69 : x
2. Step 2: Convert to fraction form
   144,015.78/216,023.42 = 59,719.69/x
3. Step 3: Cross multiply
   144,015.78x = 216,023.42 × 59,719.69
4. Step 4: Simplify right side
   144,015.78x = 12,900,851,284.38
5. Step 5: Solve for x
   x = 12,900,851,284.38/144,015.78
6. Step 6: Final answer
   x = 89,579.43