Finding the Fourth Proportional to 9,051.40, 12,501.30 and 7,211.08

Step by Step Solution

1. Step 1: Write the proportion equation
   9,051.40 : 12,501.30 = 7,211.08 : x
2. Step 2: Convert to fraction form
   9,051.40/12,501.30 = 7,211.08/x
3. Step 3: Cross multiply
   9,051.40x = 12,501.30 × 7,211.08
4. Step 4: Simplify right side
   9,051.40x = 90,147,874.40
5. Step 5: Solve for x
   x = 90,147,874.40/9,051.40
6. Step 6: Final answer
   x = 9,959.55