Finding the Fourth Proportional to 28,297.49, 42,451.56 and 13,507.47

Step by Step Solution

1. Step 1: Write the proportion equation
   28,297.49 : 42,451.56 = 13,507.47 : x
2. Step 2: Convert to fraction form
   28,297.49/42,451.56 = 13,507.47/x
3. Step 3: Cross multiply
   28,297.49x = 42,451.56 × 13,507.47
4. Step 4: Simplify right side
   28,297.49x = 573,413,173.15
5. Step 5: Solve for x
   x = 573,413,173.15/28,297.49
6. Step 6: Final answer
   x = 20,263.75