Finding the Fourth Proportional to 1,429.88, 1,971.96 and 898.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429.88 : 1,971.96 = 898.82 : x
2. Step 2: Convert to fraction form
   1,429.88/1,971.96 = 898.82/x
3. Step 3: Cross multiply
   1,429.88x = 1,971.96 × 898.82
4. Step 4: Simplify right side
   1,429.88x = 1,772,437.09
5. Step 5: Solve for x
   x = 1,772,437.09/1,429.88
6. Step 6: Final answer
   x = 1,239.57