Finding the Fourth Proportional to 9,326.45, 12,870.72 and 5,740.07

Step by Step Solution

1. Step 1: Write the proportion equation
   9,326.45 : 12,870.72 = 5,740.07 : x
2. Step 2: Convert to fraction form
   9,326.45/12,870.72 = 5,740.07/x
3. Step 3: Cross multiply
   9,326.45x = 12,870.72 × 5,740.07
4. Step 4: Simplify right side
   9,326.45x = 73,878,769.40
5. Step 5: Solve for x
   x = 73,878,769.40/9,326.45
6. Step 6: Final answer
   x = 7,921.43