Finding the Fourth Proportional to 1,437.21, 1,983.30 and 807.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,437.21 : 1,983.30 = 807.74 : x
2. Step 2: Convert to fraction form
   1,437.21/1,983.30 = 807.74/x
3. Step 3: Cross multiply
   1,437.21x = 1,983.30 × 807.74
4. Step 4: Simplify right side
   1,437.21x = 1,601,980.83
5. Step 5: Solve for x
   x = 1,601,980.83/1,437.21
6. Step 6: Final answer
   x = 1,114.65