Finding the Fourth Proportional to 99,436.32, 137,222.16 and 54,724

Step by Step Solution

1. Step 1: Write the proportion equation
   99,436.32 : 137,222.16 = 54,724 : x
2. Step 2: Convert to fraction form
   99,436.32/137,222.16 = 54,724/x
3. Step 3: Cross multiply
   99,436.32x = 137,222.16 × 54,724
4. Step 4: Simplify right side
   99,436.32x = 7,509,345,483.84
5. Step 5: Solve for x
   x = 7,509,345,483.84/99,436.32
6. Step 6: Final answer
   x = 75,519.14