Finding the Third Proportional to 1,807.31 and 3,910.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,807.31 : 3,910.78 = 3,910.78 : x
2. Step 2: Convert to fraction form
   1,807.31/3,910.78 = 3,910.78/x
3. Step 3: Cross multiply
   1,807.31x = 3,910.78 × 3,910.78
4. Step 4: Simplify right side
   1,807.31x = 15,294,209.99
5. Step 5: Solve for x
   x = 15,294,209.99/1,807.31
6. Step 6: Final answer
   x = 8,462.40