Finding the Third Proportional to 112,580 and 243,900

Step by Step Solution

1. Step 1: Write the proportion equation
   112,580 : 243,900 = 243,900 : x
2. Step 2: Convert to fraction form
   112,580/243,900 = 243,900/x
3. Step 3: Cross multiply
   112,580x = 243,900 × 243,900
4. Step 4: Simplify right side
   112,580x = 59,487,210,000
5. Step 5: Solve for x
   x = 59,487,210,000/112,580
6. Step 6: Final answer
   x = 528,399.45