Finding the Fourth Proportional to 7,100.78, 9,798.72 and 3,956.36

Step by Step Solution

1. Step 1: Write the proportion equation
   7,100.78 : 9,798.72 = 3,956.36 : x
2. Step 2: Convert to fraction form
   7,100.78/9,798.72 = 3,956.36/x
3. Step 3: Cross multiply
   7,100.78x = 9,798.72 × 3,956.36
4. Step 4: Simplify right side
   7,100.78x = 38,767,263.86
5. Step 5: Solve for x
   x = 38,767,263.86/7,100.78
6. Step 6: Final answer
   x = 5,459.58