Finding the Third Proportional to 7,641.38 and 12,157.88

Step by Step Solution

1. Step 1: Write the proportion equation
   7,641.38 : 12,157.88 = 12,157.88 : x
2. Step 2: Convert to fraction form
   7,641.38/12,157.88 = 12,157.88/x
3. Step 3: Cross multiply
   7,641.38x = 12,157.88 × 12,157.88
4. Step 4: Simplify right side
   7,641.38x = 147,813,924.52
5. Step 5: Solve for x
   x = 147,813,924.52/7,641.38
6. Step 6: Final answer
   x = 19,343.89