Finding the Fourth Proportional to 1,429.23, 1,971.51 and 897.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429.23 : 1,971.51 = 897.90 : x
2. Step 2: Convert to fraction form
   1,429.23/1,971.51 = 897.90/x
3. Step 3: Cross multiply
   1,429.23x = 1,971.51 × 897.90
4. Step 4: Simplify right side
   1,429.23x = 1,770,218.83
5. Step 5: Solve for x
   x = 1,770,218.83/1,429.23
6. Step 6: Final answer
   x = 1,238.58