Finding the Third Proportional to 85,870.13 and 131,368.50

Step by Step Solution

1. Step 1: Write the proportion equation
   85,870.13 : 131,368.50 = 131,368.50 : x
2. Step 2: Convert to fraction form
   85,870.13/131,368.50 = 131,368.50/x
3. Step 3: Cross multiply
   85,870.13x = 131,368.50 × 131,368.50
4. Step 4: Simplify right side
   85,870.13x = 17,257,682,792.25
5. Step 5: Solve for x
   x = 17,257,682,792.25/85,870.13
6. Step 6: Final answer
   x = 200,974.24