Finding the Third Proportional to 583,681 and 838,657.50

Step by Step Solution

1. Step 1: Write the proportion equation
   583,681 : 838,657.50 = 838,657.50 : x
2. Step 2: Convert to fraction form
   583,681/838,657.50 = 838,657.50/x
3. Step 3: Cross multiply
   583,681x = 838,657.50 × 838,657.50
4. Step 4: Simplify right side
   583,681x = 703,346,402,306.25
5. Step 5: Solve for x
   x = 703,346,402,306.25/583,681
6. Step 6: Final answer
   x = 1,205,018.50