Finding the Fourth Proportional to 139,045.59, 191,892.74 and 78,616.82

Step by Step Solution

1. Step 1: Write the proportion equation
   139,045.59 : 191,892.74 = 78,616.82 : x
2. Step 2: Convert to fraction form
   139,045.59/191,892.74 = 78,616.82/x
3. Step 3: Cross multiply
   139,045.59x = 191,892.74 × 78,616.82
4. Step 4: Simplify right side
   139,045.59x = 15,085,995,647.34
5. Step 5: Solve for x
   x = 15,085,995,647.34/139,045.59
6. Step 6: Final answer
   x = 108,496.76