Finding the Fourth Proportional to 28,268.72, 42,402.18 and 12,468.86

Step by Step Solution

1. Step 1: Write the proportion equation
   28,268.72 : 42,402.18 = 12,468.86 : x
2. Step 2: Convert to fraction form
   28,268.72/42,402.18 = 12,468.86/x
3. Step 3: Cross multiply
   28,268.72x = 42,402.18 × 12,468.86
4. Step 4: Simplify right side
   28,268.72x = 528,706,846.11
5. Step 5: Solve for x
   x = 528,706,846.11/28,268.72
6. Step 6: Final answer
   x = 18,702.89