Finding the Fourth Proportional to 123,621.50, 186,358.79 and 115,382.23

Step by Step Solution

1. Step 1: Write the proportion equation
   123,621.50 : 186,358.79 = 115,382.23 : x
2. Step 2: Convert to fraction form
   123,621.50/186,358.79 = 115,382.23/x
3. Step 3: Cross multiply
   123,621.50x = 186,358.79 × 115,382.23
4. Step 4: Simplify right side
   123,621.50x = 21,502,492,592.86
5. Step 5: Solve for x
   x = 21,502,492,592.86/123,621.50
6. Step 6: Final answer
   x = 173,938.14