Finding the Fourth Proportional to 130,662.84, 180,369.89 and 88,278.78

Step by Step Solution

1. Step 1: Write the proportion equation
   130,662.84 : 180,369.89 = 88,278.78 : x
2. Step 2: Convert to fraction form
   130,662.84/180,369.89 = 88,278.78/x
3. Step 3: Cross multiply
   130,662.84x = 180,369.89 × 88,278.78
4. Step 4: Simplify right side
   130,662.84x = 15,922,833,837.93
5. Step 5: Solve for x
   x = 15,922,833,837.93/130,662.84
6. Step 6: Final answer
   x = 121,861.99