Finding the Fourth Proportional to 28,210.83, 42,316.71 and 13,416.75

Step by Step Solution

1. Step 1: Write the proportion equation
   28,210.83 : 42,316.71 = 13,416.75 : x
2. Step 2: Convert to fraction form
   28,210.83/42,316.71 = 13,416.75/x
3. Step 3: Cross multiply
   28,210.83x = 42,316.71 × 13,416.75
4. Step 4: Simplify right side
   28,210.83x = 567,752,718.89
5. Step 5: Solve for x
   x = 567,752,718.89/28,210.83
6. Step 6: Final answer
   x = 20,125.35