Finding the Fourth Proportional to 1,429.56, 1,972.68 and 808.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429.56 : 1,972.68 = 808.56 : x
2. Step 2: Convert to fraction form
   1,429.56/1,972.68 = 808.56/x
3. Step 3: Cross multiply
   1,429.56x = 1,972.68 × 808.56
4. Step 4: Simplify right side
   1,429.56x = 1,595,030.14
5. Step 5: Solve for x
   x = 1,595,030.14/1,429.56
6. Step 6: Final answer
   x = 1,115.75