Finding the Fourth Proportional to 99,707.42, 137,596.67 and 54,386.37

Step by Step Solution

1. Step 1: Write the proportion equation
   99,707.42 : 137,596.67 = 54,386.37 : x
2. Step 2: Convert to fraction form
   99,707.42/137,596.67 = 54,386.37/x
3. Step 3: Cross multiply
   99,707.42x = 137,596.67 × 54,386.37
4. Step 4: Simplify right side
   99,707.42x = 7,483,383,337.40
5. Step 5: Solve for x
   x = 7,483,383,337.40/99,707.42
6. Step 6: Final answer
   x = 75,053.42