Finding the Fourth Proportional to 22,690.99, 31,314.30 and 12,619.86

Step by Step Solution

1. Step 1: Write the proportion equation
   22,690.99 : 31,314.30 = 12,619.86 : x
2. Step 2: Convert to fraction form
   22,690.99/31,314.30 = 12,619.86/x
3. Step 3: Cross multiply
   22,690.99x = 31,314.30 × 12,619.86
4. Step 4: Simplify right side
   22,690.99x = 395,182,082.00
5. Step 5: Solve for x
   x = 395,182,082.00/22,690.99
6. Step 6: Final answer
   x = 17,415.81