Finding the Fourth Proportional to 139,072.97, 191,925.31 and 78,653.45

Step by Step Solution

1. Step 1: Write the proportion equation
   139,072.97 : 191,925.31 = 78,653.45 : x
2. Step 2: Convert to fraction form
   139,072.97/191,925.31 = 78,653.45/x
3. Step 3: Cross multiply
   139,072.97x = 191,925.31 × 78,653.45
4. Step 4: Simplify right side
   139,072.97x = 15,095,587,773.82
5. Step 5: Solve for x
   x = 15,095,587,773.82/139,072.97
6. Step 6: Final answer
   x = 108,544.37