Finding the Fourth Proportional to 111,938.90, 168,000.15 and 111,064.10

Step by Step Solution

1. Step 1: Write the proportion equation
   111,938.90 : 168,000.15 = 111,064.10 : x
2. Step 2: Convert to fraction form
   111,938.90/168,000.15 = 111,064.10/x
3. Step 3: Cross multiply
   111,938.90x = 168,000.15 × 111,064.10
4. Step 4: Simplify right side
   111,938.90x = 18,658,785,459.62
5. Step 5: Solve for x
   x = 18,658,785,459.62/111,938.90
6. Step 6: Final answer
   x = 166,687.23