Finding the Third Proportional to 111,698 and 243,124

Step by Step Solution

1. Step 1: Write the proportion equation
   111,698 : 243,124 = 243,124 : x
2. Step 2: Convert to fraction form
   111,698/243,124 = 243,124/x
3. Step 3: Cross multiply
   111,698x = 243,124 × 243,124
4. Step 4: Simplify right side
   111,698x = 59,109,279,376
5. Step 5: Solve for x
   x = 59,109,279,376/111,698
6. Step 6: Final answer
   x = 529,188.34