Finding the Third Proportional to 9,875.67 and 12,915.07

Step by Step Solution

1. Step 1: Write the proportion equation
   9,875.67 : 12,915.07 = 12,915.07 : x
2. Step 2: Convert to fraction form
   9,875.67/12,915.07 = 12,915.07/x
3. Step 3: Cross multiply
   9,875.67x = 12,915.07 × 12,915.07
4. Step 4: Simplify right side
   9,875.67x = 166,799,041.18
5. Step 5: Solve for x
   x = 166,799,041.18/9,875.67
6. Step 6: Final answer
   x = 16,889.89