Finding the Fourth Proportional to 2,199.42, 3,300.93 and 900.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,199.42 : 3,300.93 = 900.90 : x
2. Step 2: Convert to fraction form
   2,199.42/3,300.93 = 900.90/x
3. Step 3: Cross multiply
   2,199.42x = 3,300.93 × 900.90
4. Step 4: Simplify right side
   2,199.42x = 2,973,807.84
5. Step 5: Solve for x
   x = 2,973,807.84/2,199.42
6. Step 6: Final answer
   x = 1,352.09