Finding the Fourth Proportional to 2,897.60, 3,998.52 and 1,904.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,897.60 : 3,998.52 = 1,904.22 : x
2. Step 2: Convert to fraction form
   2,897.60/3,998.52 = 1,904.22/x
3. Step 3: Cross multiply
   2,897.60x = 3,998.52 × 1,904.22
4. Step 4: Simplify right side
   2,897.60x = 7,614,061.75
5. Step 5: Solve for x
   x = 7,614,061.75/2,897.60
6. Step 6: Final answer
   x = 2,627.72