Finding the Fourth Proportional to 1,003.39, 1,502.35 and 591.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.39 : 1,502.35 = 591.50 : x
2. Step 2: Convert to fraction form
   1,003.39/1,502.35 = 591.50/x
3. Step 3: Cross multiply
   1,003.39x = 1,502.35 × 591.50
4. Step 4: Simplify right side
   1,003.39x = 888,642.30
5. Step 5: Solve for x
   x = 888,642.30/1,003.39
6. Step 6: Final answer
   x = 885.64