Finding the Fourth Proportional to 1,563.31, 2,156.35 and 933.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,563.31 : 2,156.35 = 933.40 : x
2. Step 2: Convert to fraction form
   1,563.31/2,156.35 = 933.40/x
3. Step 3: Cross multiply
   1,563.31x = 2,156.35 × 933.40
4. Step 4: Simplify right side
   1,563.31x = 2,012,737.09
5. Step 5: Solve for x
   x = 2,012,737.09/1,563.31
6. Step 6: Final answer
   x = 1,287.48