Finding the Fourth Proportional to 9,100.30, 12,557.88 and 5,121.25

Step by Step Solution

1. Step 1: Write the proportion equation
   9,100.30 : 12,557.88 = 5,121.25 : x
2. Step 2: Convert to fraction form
   9,100.30/12,557.88 = 5,121.25/x
3. Step 3: Cross multiply
   9,100.30x = 12,557.88 × 5,121.25
4. Step 4: Simplify right side
   9,100.30x = 64,312,042.95
5. Step 5: Solve for x
   x = 64,312,042.95/9,100.30
6. Step 6: Final answer
   x = 7,067.02