Finding the Fourth Proportional to 139,073.97, 191,926.69 and 78,654.45

Step by Step Solution

1. Step 1: Write the proportion equation
   139,073.97 : 191,926.69 = 78,654.45 : x
2. Step 2: Convert to fraction form
   139,073.97/191,926.69 = 78,654.45/x
3. Step 3: Cross multiply
   139,073.97x = 191,926.69 × 78,654.45
4. Step 4: Simplify right side
   139,073.97x = 15,095,888,242.27
5. Step 5: Solve for x
   x = 15,095,888,242.27/139,073.97
6. Step 6: Final answer
   x = 108,545.75