Finding the Fourth Proportional to 28,499.56, 42,750.06 and 13,503.16

Step by Step Solution

1. Step 1: Write the proportion equation
   28,499.56 : 42,750.06 = 13,503.16 : x
2. Step 2: Convert to fraction form
   28,499.56/42,750.06 = 13,503.16/x
3. Step 3: Cross multiply
   28,499.56x = 42,750.06 × 13,503.16
4. Step 4: Simplify right side
   28,499.56x = 577,260,900.19
5. Step 5: Solve for x
   x = 577,260,900.19/28,499.56
6. Step 6: Final answer
   x = 20,255.08