Finding the Fourth Proportional to 1,562.90, 2,155.88 and 1,003.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,562.90 : 2,155.88 = 1,003.16 : x
2. Step 2: Convert to fraction form
   1,562.90/2,155.88 = 1,003.16/x
3. Step 3: Cross multiply
   1,562.90x = 2,155.88 × 1,003.16
4. Step 4: Simplify right side
   1,562.90x = 2,162,692.58
5. Step 5: Solve for x
   x = 2,162,692.58/1,562.90
6. Step 6: Final answer
   x = 1,383.77