Finding the Fourth Proportional to 1,428.32, 1,971.00 and 798.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,428.32 : 1,971.00 = 798.72 : x
2. Step 2: Convert to fraction form
   1,428.32/1,971.00 = 798.72/x
3. Step 3: Cross multiply
   1,428.32x = 1,971.00 × 798.72
4. Step 4: Simplify right side
   1,428.32x = 1,574,282.58
5. Step 5: Solve for x
   x = 1,574,282.58/1,428.32
6. Step 6: Final answer
   x = 1,102.19