Finding the Third Proportional to 535,407 and 860,998.50

Step by Step Solution

1. Step 1: Write the proportion equation
   535,407 : 860,998.50 = 860,998.50 : x
2. Step 2: Convert to fraction form
   535,407/860,998.50 = 860,998.50/x
3. Step 3: Cross multiply
   535,407x = 860,998.50 × 860,998.50
4. Step 4: Simplify right side
   535,407x = 741,318,417,002.25
5. Step 5: Solve for x
   x = 741,318,417,002.25/535,407
6. Step 6: Final answer
   x = 1,384,588.58