Finding the Fourth Proportional to 9,213.94, 13,807.72 and 5,257.02

Step by Step Solution

1. Step 1: Write the proportion equation
   9,213.94 : 13,807.72 = 5,257.02 : x
2. Step 2: Convert to fraction form
   9,213.94/13,807.72 = 5,257.02/x
3. Step 3: Cross multiply
   9,213.94x = 13,807.72 × 5,257.02
4. Step 4: Simplify right side
   9,213.94x = 72,587,411.31
5. Step 5: Solve for x
   x = 72,587,411.31/9,213.94
6. Step 6: Final answer
   x = 7,878.00