Finding the Fourth Proportional to 1,086.40, 1,628.59 and 592.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.40 : 1,628.59 = 592.07 : x
2. Step 2: Convert to fraction form
   1,086.40/1,628.59 = 592.07/x
3. Step 3: Cross multiply
   1,086.40x = 1,628.59 × 592.07
4. Step 4: Simplify right side
   1,086.40x = 964,236.32
5. Step 5: Solve for x
   x = 964,236.32/1,086.40
6. Step 6: Final answer
   x = 887.56