Finding the Fourth Proportional to 78,144.18, 107,838.45 and 42,333.36

Step by Step Solution

1. Step 1: Write the proportion equation
   78,144.18 : 107,838.45 = 42,333.36 : x
2. Step 2: Convert to fraction form
   78,144.18/107,838.45 = 42,333.36/x
3. Step 3: Cross multiply
   78,144.18x = 107,838.45 × 42,333.36
4. Step 4: Simplify right side
   78,144.18x = 4,565,163,925.69
5. Step 5: Solve for x
   x = 4,565,163,925.69/78,144.18
6. Step 6: Final answer
   x = 58,419.76