Finding the Third Proportional to 340,128 and 530,869.50

Step by Step Solution

1. Step 1: Write the proportion equation
   340,128 : 530,869.50 = 530,869.50 : x
2. Step 2: Convert to fraction form
   340,128/530,869.50 = 530,869.50/x
3. Step 3: Cross multiply
   340,128x = 530,869.50 × 530,869.50
4. Step 4: Simplify right side
   340,128x = 281,822,426,030.25
5. Step 5: Solve for x
   x = 281,822,426,030.25/340,128
6. Step 6: Final answer
   x = 828,577.55