Finding the Fourth Proportional to 86,400.76, 119,238.54 and 65,142.52

Step by Step Solution

1. Step 1: Write the proportion equation
   86,400.76 : 119,238.54 = 65,142.52 : x
2. Step 2: Convert to fraction form
   86,400.76/119,238.54 = 65,142.52/x
3. Step 3: Cross multiply
   86,400.76x = 119,238.54 × 65,142.52
4. Step 4: Simplify right side
   86,400.76x = 7,767,498,976.72
5. Step 5: Solve for x
   x = 7,767,498,976.72/86,400.76
6. Step 6: Final answer
   x = 89,900.82