Finding the Fourth Proportional to 16,803.55, 25,206.71 and 5,116.78

Step by Step Solution

1. Step 1: Write the proportion equation
   16,803.55 : 25,206.71 = 5,116.78 : x
2. Step 2: Convert to fraction form
   16,803.55/25,206.71 = 5,116.78/x
3. Step 3: Cross multiply
   16,803.55x = 25,206.71 × 5,116.78
4. Step 4: Simplify right side
   16,803.55x = 128,977,189.59
5. Step 5: Solve for x
   x = 128,977,189.59/16,803.55
6. Step 6: Final answer
   x = 7,675.59