Finding the Fourth Proportional to 9,751.80, 13,460.40 and 5,720.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,751.80 : 13,460.40 = 5,720.88 : x
2. Step 2: Convert to fraction form
   9,751.80/13,460.40 = 5,720.88/x
3. Step 3: Cross multiply
   9,751.80x = 13,460.40 × 5,720.88
4. Step 4: Simplify right side
   9,751.80x = 77,005,333.15
5. Step 5: Solve for x
   x = 77,005,333.15/9,751.80
6. Step 6: Final answer
   x = 7,896.53