Finding the Fourth Proportional to 1,567.40, 2,162.90 and 904.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,567.40 : 2,162.90 = 904.12 : x
2. Step 2: Convert to fraction form
   1,567.40/2,162.90 = 904.12/x
3. Step 3: Cross multiply
   1,567.40x = 2,162.90 × 904.12
4. Step 4: Simplify right side
   1,567.40x = 1,955,521.15
5. Step 5: Solve for x
   x = 1,955,521.15/1,567.40
6. Step 6: Final answer
   x = 1,247.62