Finding the Fourth Proportional to 139,010.95, 191,833.03 and 78,579.47

Step by Step Solution

1. Step 1: Write the proportion equation
   139,010.95 : 191,833.03 = 78,579.47 : x
2. Step 2: Convert to fraction form
   139,010.95/191,833.03 = 78,579.47/x
3. Step 3: Cross multiply
   139,010.95x = 191,833.03 × 78,579.47
4. Step 4: Simplify right side
   139,010.95x = 15,074,137,825.89
5. Step 5: Solve for x
   x = 15,074,137,825.89/139,010.95
6. Step 6: Final answer
   x = 108,438.49