Finding the Fourth Proportional to 9,111.06, 12,572.69 and 5,131.94

Step by Step Solution

1. Step 1: Write the proportion equation
   9,111.06 : 12,572.69 = 5,131.94 : x
2. Step 2: Convert to fraction form
   9,111.06/12,572.69 = 5,131.94/x
3. Step 3: Cross multiply
   9,111.06x = 12,572.69 × 5,131.94
4. Step 4: Simplify right side
   9,111.06x = 64,522,290.72
5. Step 5: Solve for x
   x = 64,522,290.72/9,111.06
6. Step 6: Final answer
   x = 7,081.75