Finding the Fourth Proportional to 9,100.22, 12,557.62 and 5,120.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,100.22 : 12,557.62 = 5,120.56 : x
2. Step 2: Convert to fraction form
   9,100.22/12,557.62 = 5,120.56/x
3. Step 3: Cross multiply
   9,100.22x = 12,557.62 × 5,120.56
4. Step 4: Simplify right side
   9,100.22x = 64,302,046.67
5. Step 5: Solve for x
   x = 64,302,046.67/9,100.22
6. Step 6: Final answer
   x = 7,065.99