Finding the Third Proportional to 111,142.50 and 169,437

Step by Step Solution

1. Step 1: Write the proportion equation
   111,142.50 : 169,437 = 169,437 : x
2. Step 2: Convert to fraction form
   111,142.50/169,437 = 169,437/x
3. Step 3: Cross multiply
   111,142.50x = 169,437 × 169,437
4. Step 4: Simplify right side
   111,142.50x = 28,708,896,969
5. Step 5: Solve for x
   x = 28,708,896,969/111,142.50
6. Step 6: Final answer
   x = 258,307.10