Finding the Fourth Proportional to 9,146.76, 12,621.88 and 5,370.09

Step by Step Solution

1. Step 1: Write the proportion equation
   9,146.76 : 12,621.88 = 5,370.09 : x
2. Step 2: Convert to fraction form
   9,146.76/12,621.88 = 5,370.09/x
3. Step 3: Cross multiply
   9,146.76x = 12,621.88 × 5,370.09
4. Step 4: Simplify right side
   9,146.76x = 67,780,631.57
5. Step 5: Solve for x
   x = 67,780,631.57/9,146.76
6. Step 6: Final answer
   x = 7,410.34