Finding the Fourth Proportional to 9,106.81, 12,570.91 and 7,118.01

Step by Step Solution

1. Step 1: Write the proportion equation
   9,106.81 : 12,570.91 = 7,118.01 : x
2. Step 2: Convert to fraction form
   9,106.81/12,570.91 = 7,118.01/x
3. Step 3: Cross multiply
   9,106.81x = 12,570.91 × 7,118.01
4. Step 4: Simplify right side
   9,106.81x = 89,479,845.29
5. Step 5: Solve for x
   x = 89,479,845.29/9,106.81
6. Step 6: Final answer
   x = 9,825.60