Finding the Fourth Proportional to 78,196.40, 107,908.13 and 42,385.64

Step by Step Solution

1. Step 1: Write the proportion equation
   78,196.40 : 107,908.13 = 42,385.64 : x
2. Step 2: Convert to fraction form
   78,196.40/107,908.13 = 42,385.64/x
3. Step 3: Cross multiply
   78,196.40x = 107,908.13 × 42,385.64
4. Step 4: Simplify right side
   78,196.40x = 4,573,754,611.71
5. Step 5: Solve for x
   x = 4,573,754,611.71/78,196.40
6. Step 6: Final answer
   x = 58,490.61