Finding the Fourth Proportional to 89,908.94, 124,085.78 and 54,118.28

Step by Step Solution

1. Step 1: Write the proportion equation
   89,908.94 : 124,085.78 = 54,118.28 : x
2. Step 2: Convert to fraction form
   89,908.94/124,085.78 = 54,118.28/x
3. Step 3: Cross multiply
   89,908.94x = 124,085.78 × 54,118.28
4. Step 4: Simplify right side
   89,908.94x = 6,715,308,095.04
5. Step 5: Solve for x
   x = 6,715,308,095.04/89,908.94
6. Step 6: Final answer
   x = 74,690.11