Finding the Fourth Proportional to 78,068.61, 117,143.92 and 42,555.38

Step by Step Solution

1. Step 1: Write the proportion equation
   78,068.61 : 117,143.92 = 42,555.38 : x
2. Step 2: Convert to fraction form
   78,068.61/117,143.92 = 42,555.38/x
3. Step 3: Cross multiply
   78,068.61x = 117,143.92 × 42,555.38
4. Step 4: Simplify right side
   78,068.61x = 4,985,103,497.76
5. Step 5: Solve for x
   x = 4,985,103,497.76/78,068.61
6. Step 6: Final answer
   x = 63,855.42