Finding the Fourth Proportional to 78,349.79, 108,123.49 and 42,540.10

Step by Step Solution

1. Step 1: Write the proportion equation
   78,349.79 : 108,123.49 = 42,540.10 : x
2. Step 2: Convert to fraction form
   78,349.79/108,123.49 = 42,540.10/x
3. Step 3: Cross multiply
   78,349.79x = 108,123.49 × 42,540.10
4. Step 4: Simplify right side
   78,349.79x = 4,599,583,859.82
5. Step 5: Solve for x
   x = 4,599,583,859.82/78,349.79
6. Step 6: Final answer
   x = 58,705.76