Finding the Third Proportional to 129,870 and 270,130.50

Step by Step Solution

1. Step 1: Write the proportion equation
   129,870 : 270,130.50 = 270,130.50 : x
2. Step 2: Convert to fraction form
   129,870/270,130.50 = 270,130.50/x
3. Step 3: Cross multiply
   129,870x = 270,130.50 × 270,130.50
4. Step 4: Simplify right side
   129,870x = 72,970,487,030.25
5. Step 5: Solve for x
   x = 72,970,487,030.25/129,870
6. Step 6: Final answer
   x = 561,873.31