Finding the Fourth Proportional to 8,940.02, 13,407.12 and 8,357.63

Step by Step Solution

1. Step 1: Write the proportion equation
   8,940.02 : 13,407.12 = 8,357.63 : x
2. Step 2: Convert to fraction form
   8,940.02/13,407.12 = 8,357.63/x
3. Step 3: Cross multiply
   8,940.02x = 13,407.12 × 8,357.63
4. Step 4: Simplify right side
   8,940.02x = 112,051,681.29
5. Step 5: Solve for x
   x = 112,051,681.29/8,940.02
6. Step 6: Final answer
   x = 12,533.72