Finding the Fourth Proportional to 21,522.46, 29,702.78 and 12,572.84

Step by Step Solution

1. Step 1: Write the proportion equation
   21,522.46 : 29,702.78 = 12,572.84 : x
2. Step 2: Convert to fraction form
   21,522.46/29,702.78 = 12,572.84/x
3. Step 3: Cross multiply
   21,522.46x = 29,702.78 × 12,572.84
4. Step 4: Simplify right side
   21,522.46x = 373,448,300.50
5. Step 5: Solve for x
   x = 373,448,300.50/21,522.46
6. Step 6: Final answer
   x = 17,351.56