Finding the Third Proportional to 111,645 and 240,781.50

Step by Step Solution

1. Step 1: Write the proportion equation
   111,645 : 240,781.50 = 240,781.50 : x
2. Step 2: Convert to fraction form
   111,645/240,781.50 = 240,781.50/x
3. Step 3: Cross multiply
   111,645x = 240,781.50 × 240,781.50
4. Step 4: Simplify right side
   111,645x = 57,975,730,742.25
5. Step 5: Solve for x
   x = 57,975,730,742.25/111,645
6. Step 6: Final answer
   x = 519,286.41