Finding the Third Proportional to 131,870.25 and 289,012.50

Step by Step Solution

1. Step 1: Write the proportion equation
   131,870.25 : 289,012.50 = 289,012.50 : x
2. Step 2: Convert to fraction form
   131,870.25/289,012.50 = 289,012.50/x
3. Step 3: Cross multiply
   131,870.25x = 289,012.50 × 289,012.50
4. Step 4: Simplify right side
   131,870.25x = 83,528,225,156.25
5. Step 5: Solve for x
   x = 83,528,225,156.25/131,870.25
6. Step 6: Final answer
   x = 633,412.20