Finding the Fourth Proportional to 22,384.31, 30,889.69 and 12,312.74

Step by Step Solution

1. Step 1: Write the proportion equation
   22,384.31 : 30,889.69 = 12,312.74 : x
2. Step 2: Convert to fraction form
   22,384.31/30,889.69 = 12,312.74/x
3. Step 3: Cross multiply
   22,384.31x = 30,889.69 × 12,312.74
4. Step 4: Simplify right side
   22,384.31x = 380,336,721.65
5. Step 5: Solve for x
   x = 380,336,721.65/22,384.31
6. Step 6: Final answer
   x = 16,991.22