Finding the Third Proportional to 340,842 and 528,487.50

Step by Step Solution

1. Step 1: Write the proportion equation
   340,842 : 528,487.50 = 528,487.50 : x
2. Step 2: Convert to fraction form
   340,842/528,487.50 = 528,487.50/x
3. Step 3: Cross multiply
   340,842x = 528,487.50 × 528,487.50
4. Step 4: Simplify right side
   340,842x = 279,299,037,656.25
5. Step 5: Solve for x
   x = 279,299,037,656.25/340,842
6. Step 6: Final answer
   x = 819,438.44