Finding the Fourth Proportional to 22,830.47, 31,506 and 12,758.91

Step by Step Solution

1. Step 1: Write the proportion equation
   22,830.47 : 31,506 = 12,758.91 : x
2. Step 2: Convert to fraction form
   22,830.47/31,506 = 12,758.91/x
3. Step 3: Cross multiply
   22,830.47x = 31,506 × 12,758.91
4. Step 4: Simplify right side
   22,830.47x = 401,982,218.46
5. Step 5: Solve for x
   x = 401,982,218.46/22,830.47
6. Step 6: Final answer
   x = 17,607.27