Finding the Fourth Proportional to 1,503.59, 2,075.36 and 978.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,503.59 : 2,075.36 = 978.71 : x
2. Step 2: Convert to fraction form
   1,503.59/2,075.36 = 978.71/x
3. Step 3: Cross multiply
   1,503.59x = 2,075.36 × 978.71
4. Step 4: Simplify right side
   1,503.59x = 2,031,160.32
5. Step 5: Solve for x
   x = 2,031,160.32/1,503.59
6. Step 6: Final answer
   x = 1,350.88