Finding the Fourth Proportional to 9,100.85, 12,558.93 and 5,122.81

Step by Step Solution

1. Step 1: Write the proportion equation
   9,100.85 : 12,558.93 = 5,122.81 : x
2. Step 2: Convert to fraction form
   9,100.85/12,558.93 = 5,122.81/x
3. Step 3: Cross multiply
   9,100.85x = 12,558.93 × 5,122.81
4. Step 4: Simplify right side
   9,100.85x = 64,336,949.40
5. Step 5: Solve for x
   x = 64,336,949.40/9,100.85
6. Step 6: Final answer
   x = 7,069.33