Finding the Fourth Proportional to 28,216.41, 42,269.67 and 13,404.93

Step by Step Solution

1. Step 1: Write the proportion equation
   28,216.41 : 42,269.67 = 13,404.93 : x
2. Step 2: Convert to fraction form
   28,216.41/42,269.67 = 13,404.93/x
3. Step 3: Cross multiply
   28,216.41x = 42,269.67 × 13,404.93
4. Step 4: Simplify right side
   28,216.41x = 566,621,967.47
5. Step 5: Solve for x
   x = 566,621,967.47/28,216.41
6. Step 6: Final answer
   x = 20,081.29