Finding the Third Proportional to 111,935.50 and 155,143.50

Step by Step Solution

1. Step 1: Write the proportion equation
   111,935.50 : 155,143.50 = 155,143.50 : x
2. Step 2: Convert to fraction form
   111,935.50/155,143.50 = 155,143.50/x
3. Step 3: Cross multiply
   111,935.50x = 155,143.50 × 155,143.50
4. Step 4: Simplify right side
   111,935.50x = 24,069,505,592.25
5. Step 5: Solve for x
   x = 24,069,505,592.25/111,935.50
6. Step 6: Final answer
   x = 215,030.13