Finding the Fourth Proportional to 139,118.72, 191,955.84 and 88,151.36

Step by Step Solution

1. Step 1: Write the proportion equation
   139,118.72 : 191,955.84 = 88,151.36 : x
2. Step 2: Convert to fraction form
   139,118.72/191,955.84 = 88,151.36/x
3. Step 3: Cross multiply
   139,118.72x = 191,955.84 × 88,151.36
4. Step 4: Simplify right side
   139,118.72x = 16,921,168,355.94
5. Step 5: Solve for x
   x = 16,921,168,355.94/139,118.72
6. Step 6: Final answer
   x = 121,631.14