Finding the Fourth Proportional to 78,143.79, 107,838.30 and 42,334.71

Step by Step Solution

1. Step 1: Write the proportion equation
   78,143.79 : 107,838.30 = 42,334.71 : x
2. Step 2: Convert to fraction form
   78,143.79/107,838.30 = 42,334.71/x
3. Step 3: Cross multiply
   78,143.79x = 107,838.30 × 42,334.71
4. Step 4: Simplify right side
   78,143.79x = 4,565,303,157.39
5. Step 5: Solve for x
   x = 4,565,303,157.39/78,143.79
6. Step 6: Final answer
   x = 58,421.83