Finding the Fourth Proportional to 28,088.52, 42,111.60 and 16,992.84

Step by Step Solution

1. Step 1: Write the proportion equation
   28,088.52 : 42,111.60 = 16,992.84 : x
2. Step 2: Convert to fraction form
   28,088.52/42,111.60 = 16,992.84/x
3. Step 3: Cross multiply
   28,088.52x = 42,111.60 × 16,992.84
4. Step 4: Simplify right side
   28,088.52x = 715,595,680.94
5. Step 5: Solve for x
   x = 715,595,680.94/28,088.52
6. Step 6: Final answer
   x = 25,476.45