Finding the Fourth Proportional to 78,672.48, 108,569.28 and 42,864

Step by Step Solution

1. Step 1: Write the proportion equation
   78,672.48 : 108,569.28 = 42,864 : x
2. Step 2: Convert to fraction form
   78,672.48/108,569.28 = 42,864/x
3. Step 3: Cross multiply
   78,672.48x = 108,569.28 × 42,864
4. Step 4: Simplify right side
   78,672.48x = 4,653,713,617.92
5. Step 5: Solve for x
   x = 4,653,713,617.92/78,672.48
6. Step 6: Final answer
   x = 59,153.01