Finding the Fourth Proportional to 99,612, 137,466.72 and 54,900

Step by Step Solution

1. Step 1: Write the proportion equation
   99,612 : 137,466.72 = 54,900 : x
2. Step 2: Convert to fraction form
   99,612/137,466.72 = 54,900/x
3. Step 3: Cross multiply
   99,612x = 137,466.72 × 54,900
4. Step 4: Simplify right side
   99,612x = 7,546,922,928
5. Step 5: Solve for x
   x = 7,546,922,928/99,612
6. Step 6: Final answer
   x = 75,763.19