Finding the Fourth Proportional to 1,242.58, 1,864.10 and 593.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,242.58 : 1,864.10 = 593.31 : x
2. Step 2: Convert to fraction form
   1,242.58/1,864.10 = 593.31/x
3. Step 3: Cross multiply
   1,242.58x = 1,864.10 × 593.31
4. Step 4: Simplify right side
   1,242.58x = 1,105,989.17
5. Step 5: Solve for x
   x = 1,105,989.17/1,242.58
6. Step 6: Final answer
   x = 890.07