Finding the Fourth Proportional to 28,498.56, 42,748.56 and 13,502.16

Step by Step Solution

1. Step 1: Write the proportion equation
   28,498.56 : 42,748.56 = 13,502.16 : x
2. Step 2: Convert to fraction form
   28,498.56/42,748.56 = 13,502.16/x
3. Step 3: Cross multiply
   28,498.56x = 42,748.56 × 13,502.16
4. Step 4: Simplify right side
   28,498.56x = 577,197,896.89
5. Step 5: Solve for x
   x = 577,197,896.89/28,498.56
6. Step 6: Final answer
   x = 20,253.58