Finding the Fourth Proportional to 111,988.42, 154,544.03 and 61,687.42

Step by Step Solution

1. Step 1: Write the proportion equation
   111,988.42 : 154,544.03 = 61,687.42 : x
2. Step 2: Convert to fraction form
   111,988.42/154,544.03 = 61,687.42/x
3. Step 3: Cross multiply
   111,988.42x = 154,544.03 × 61,687.42
4. Step 4: Simplify right side
   111,988.42x = 9,533,422,487.10
5. Step 5: Solve for x
   x = 9,533,422,487.10/111,988.42
6. Step 6: Final answer
   x = 85,128.65