Finding the Fourth Proportional to 99,967.10, 137,957.91 and 54,644.18

Step by Step Solution

1. Step 1: Write the proportion equation
   99,967.10 : 137,957.91 = 54,644.18 : x
2. Step 2: Convert to fraction form
   99,967.10/137,957.91 = 54,644.18/x
3. Step 3: Cross multiply
   99,967.10x = 137,957.91 × 54,644.18
4. Step 4: Simplify right side
   99,967.10x = 7,538,596,866.46
5. Step 5: Solve for x
   x = 7,538,596,866.46/99,967.10
6. Step 6: Final answer
   x = 75,410.78