Finding the Third Proportional to 1,915.05 and 4,003.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,915.05 : 4,003.80 = 4,003.80 : x
2. Step 2: Convert to fraction form
   1,915.05/4,003.80 = 4,003.80/x
3. Step 3: Cross multiply
   1,915.05x = 4,003.80 × 4,003.80
4. Step 4: Simplify right side
   1,915.05x = 16,030,451.98
5. Step 5: Solve for x
   x = 16,030,451.98/1,915.05
6. Step 6: Final answer
   x = 8,370.78