Finding the Fourth Proportional to 1,564.01, 2,157.15 and 934.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,564.01 : 2,157.15 = 934.49 : x
2. Step 2: Convert to fraction form
   1,564.01/2,157.15 = 934.49/x
3. Step 3: Cross multiply
   1,564.01x = 2,157.15 × 934.49
4. Step 4: Simplify right side
   1,564.01x = 2,015,835.10
5. Step 5: Solve for x
   x = 2,015,835.10/1,564.01
6. Step 6: Final answer
   x = 1,288.89