Finding the Fourth Proportional to 9,698.63, 13,385.72 and 5,720.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,698.63 : 13,385.72 = 5,720.72 : x
2. Step 2: Convert to fraction form
   9,698.63/13,385.72 = 5,720.72/x
3. Step 3: Cross multiply
   9,698.63x = 13,385.72 × 5,720.72
4. Step 4: Simplify right side
   9,698.63x = 76,575,903.49
5. Step 5: Solve for x
   x = 76,575,903.49/9,698.63
6. Step 6: Final answer
   x = 7,895.54