Finding the Fourth Proportional to 9,756.21, 13,460.07 and 5,978.01

Step by Step Solution

1. Step 1: Write the proportion equation
   9,756.21 : 13,460.07 = 5,978.01 : x
2. Step 2: Convert to fraction form
   9,756.21/13,460.07 = 5,978.01/x
3. Step 3: Cross multiply
   9,756.21x = 13,460.07 × 5,978.01
4. Step 4: Simplify right side
   9,756.21x = 80,464,433.06
5. Step 5: Solve for x
   x = 80,464,433.06/9,756.21
6. Step 6: Final answer
   x = 8,247.51