Finding the Fourth Proportional to 2,199.93, 3,300.48 and 902.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,199.93 : 3,300.48 = 902.31 : x
2. Step 2: Convert to fraction form
   2,199.93/3,300.48 = 902.31/x
3. Step 3: Cross multiply
   2,199.93x = 3,300.48 × 902.31
4. Step 4: Simplify right side
   2,199.93x = 2,978,056.11
5. Step 5: Solve for x
   x = 2,978,056.11/2,199.93
6. Step 6: Final answer
   x = 1,353.70