Finding the Third Proportional to 1,490.91 and 3,370.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,490.91 : 3,370.78 = 3,370.78 : x
2. Step 2: Convert to fraction form
   1,490.91/3,370.78 = 3,370.78/x
3. Step 3: Cross multiply
   1,490.91x = 3,370.78 × 3,370.78
4. Step 4: Simplify right side
   1,490.91x = 11,362,166.24
5. Step 5: Solve for x
   x = 11,362,166.24/1,490.91
6. Step 6: Final answer
   x = 7,620.98