Finding the Fourth Proportional to 9,100.66, 12,557.01 and 5,121.94

Step by Step Solution

1. Step 1: Write the proportion equation
   9,100.66 : 12,557.01 = 5,121.94 : x
2. Step 2: Convert to fraction form
   9,100.66/12,557.01 = 5,121.94/x
3. Step 3: Cross multiply
   9,100.66x = 12,557.01 × 5,121.94
4. Step 4: Simplify right side
   9,100.66x = 64,316,251.80
5. Step 5: Solve for x
   x = 64,316,251.80/9,100.66
6. Step 6: Final answer
   x = 7,067.21