Finding the Fourth Proportional to 9,111.56, 12,574.21 and 5,133.05

Step by Step Solution

1. Step 1: Write the proportion equation
   9,111.56 : 12,574.21 = 5,133.05 : x
2. Step 2: Convert to fraction form
   9,111.56/12,574.21 = 5,133.05/x
3. Step 3: Cross multiply
   9,111.56x = 12,574.21 × 5,133.05
4. Step 4: Simplify right side
   9,111.56x = 64,543,985.77
5. Step 5: Solve for x
   x = 64,543,985.77/9,111.56
6. Step 6: Final answer
   x = 7,083.75