Finding the Third Proportional to 3,430.69 and 7,490.81

Step by Step Solution

1. Step 1: Write the proportion equation
   3,430.69 : 7,490.81 = 7,490.81 : x
2. Step 2: Convert to fraction form
   3,430.69/7,490.81 = 7,490.81/x
3. Step 3: Cross multiply
   3,430.69x = 7,490.81 × 7,490.81
4. Step 4: Simplify right side
   3,430.69x = 56,112,271.91
5. Step 5: Solve for x
   x = 56,112,271.91/3,430.69
6. Step 6: Final answer
   x = 16,355.98