Finding the Third Proportional to 56,317.50 and 123,478.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,317.50 : 123,478.50 = 123,478.50 : x
2. Step 2: Convert to fraction form
   56,317.50/123,478.50 = 123,478.50/x
3. Step 3: Cross multiply
   56,317.50x = 123,478.50 × 123,478.50
4. Step 4: Simplify right side
   56,317.50x = 15,246,939,962.25
5. Step 5: Solve for x
   x = 15,246,939,962.25/56,317.50
6. Step 6: Final answer
   x = 270,731.83