Finding the Fourth Proportional to 2,913.37, 4,368.72 and 938.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,913.37 : 4,368.72 = 938.64 : x
2. Step 2: Convert to fraction form
   2,913.37/4,368.72 = 938.64/x
3. Step 3: Cross multiply
   2,913.37x = 4,368.72 × 938.64
4. Step 4: Simplify right side
   2,913.37x = 4,100,655.34
5. Step 5: Solve for x
   x = 4,100,655.34/2,913.37
6. Step 6: Final answer
   x = 1,407.53