Finding the Third Proportional to 1,376.58 and 2,931.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,376.58 : 2,931.05 = 2,931.05 : x
2. Step 2: Convert to fraction form
   1,376.58/2,931.05 = 2,931.05/x
3. Step 3: Cross multiply
   1,376.58x = 2,931.05 × 2,931.05
4. Step 4: Simplify right side
   1,376.58x = 8,591,035.78
5. Step 5: Solve for x
   x = 8,591,035.78/1,376.58
6. Step 6: Final answer
   x = 6,240.86