Finding the Fourth Proportional to 139,841.52, 192,966.82 and 78,577.98

Step by Step Solution

1. Step 1: Write the proportion equation
   139,841.52 : 192,966.82 = 78,577.98 : x
2. Step 2: Convert to fraction form
   139,841.52/192,966.82 = 78,577.98/x
3. Step 3: Cross multiply
   139,841.52x = 192,966.82 × 78,577.98
4. Step 4: Simplify right side
   139,841.52x = 15,162,942,002.55
5. Step 5: Solve for x
   x = 15,162,942,002.55/139,841.52
6. Step 6: Final answer
   x = 108,429.47