Finding the Fourth Proportional to 22,300.71, 30,775.86 and 12,742.17

Step by Step Solution

1. Step 1: Write the proportion equation
   22,300.71 : 30,775.86 = 12,742.17 : x
2. Step 2: Convert to fraction form
   22,300.71/30,775.86 = 12,742.17/x
3. Step 3: Cross multiply
   22,300.71x = 30,775.86 × 12,742.17
4. Step 4: Simplify right side
   22,300.71x = 392,151,240.02
5. Step 5: Solve for x
   x = 392,151,240.02/22,300.71
6. Step 6: Final answer
   x = 17,584.70