Finding the Third Proportional to 85,428 and 131,485.50

Step by Step Solution

1. Step 1: Write the proportion equation
   85,428 : 131,485.50 = 131,485.50 : x
2. Step 2: Convert to fraction form
   85,428/131,485.50 = 131,485.50/x
3. Step 3: Cross multiply
   85,428x = 131,485.50 × 131,485.50
4. Step 4: Simplify right side
   85,428x = 17,288,436,710.25
5. Step 5: Solve for x
   x = 17,288,436,710.25/85,428
6. Step 6: Final answer
   x = 202,374.36