Finding the Fourth Proportional to 28,302.72, 42,389.34 and 13,522.02

Step by Step Solution

1. Step 1: Write the proportion equation
   28,302.72 : 42,389.34 = 13,522.02 : x
2. Step 2: Convert to fraction form
   28,302.72/42,389.34 = 13,522.02/x
3. Step 3: Cross multiply
   28,302.72x = 42,389.34 × 13,522.02
4. Step 4: Simplify right side
   28,302.72x = 573,189,503.27
5. Step 5: Solve for x
   x = 573,189,503.27/28,302.72
6. Step 6: Final answer
   x = 20,252.10