Finding the Fourth Proportional to 139,341.56, 192,291.41 and 78,912.22

Step by Step Solution

1. Step 1: Write the proportion equation
   139,341.56 : 192,291.41 = 78,912.22 : x
2. Step 2: Convert to fraction form
   139,341.56/192,291.41 = 78,912.22/x
3. Step 3: Cross multiply
   139,341.56x = 192,291.41 × 78,912.22
4. Step 4: Simplify right side
   139,341.56x = 15,174,141,655.47
5. Step 5: Solve for x
   x = 15,174,141,655.47/139,341.56
6. Step 6: Final answer
   x = 108,898.89