Finding the Third Proportional to 111,139 and 243,359

Step by Step Solution

1. Step 1: Write the proportion equation
   111,139 : 243,359 = 243,359 : x
2. Step 2: Convert to fraction form
   111,139/243,359 = 243,359/x
3. Step 3: Cross multiply
   111,139x = 243,359 × 243,359
4. Step 4: Simplify right side
   111,139x = 59,223,602,881
5. Step 5: Solve for x
   x = 59,223,602,881/111,139
6. Step 6: Final answer
   x = 532,878.67