Finding the Fourth Proportional to 16,803.76, 25,209.39 and 5,117.88

Step by Step Solution

1. Step 1: Write the proportion equation
   16,803.76 : 25,209.39 = 5,117.88 : x
2. Step 2: Convert to fraction form
   16,803.76/25,209.39 = 5,117.88/x
3. Step 3: Cross multiply
   16,803.76x = 25,209.39 × 5,117.88
4. Step 4: Simplify right side
   16,803.76x = 129,018,632.89
5. Step 5: Solve for x
   x = 129,018,632.89/16,803.76
6. Step 6: Final answer
   x = 7,677.96