Finding the Fourth Proportional to 12,314.98, 18,470.82 and 3,430.90

Step by Step Solution

1. Step 1: Write the proportion equation
   12,314.98 : 18,470.82 = 3,430.90 : x
2. Step 2: Convert to fraction form
   12,314.98/18,470.82 = 3,430.90/x
3. Step 3: Cross multiply
   12,314.98x = 18,470.82 × 3,430.90
4. Step 4: Simplify right side
   12,314.98x = 63,371,536.34
5. Step 5: Solve for x
   x = 63,371,536.34/12,314.98
6. Step 6: Final answer
   x = 5,145.89