Finding the Fourth Proportional to 7,810.80, 10,770.72 and 5,154.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,810.80 : 10,770.72 = 5,154.72 : x
2. Step 2: Convert to fraction form
   7,810.80/10,770.72 = 5,154.72/x
3. Step 3: Cross multiply
   7,810.80x = 10,770.72 × 5,154.72
4. Step 4: Simplify right side
   7,810.80x = 55,520,045.80
5. Step 5: Solve for x
   x = 55,520,045.80/7,810.80
6. Step 6: Final answer
   x = 7,108.11