Finding the Fourth Proportional to 1,538.04, 2,122.94 and 978.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,538.04 : 2,122.94 = 978.52 : x
2. Step 2: Convert to fraction form
   1,538.04/2,122.94 = 978.52/x
3. Step 3: Cross multiply
   1,538.04x = 2,122.94 × 978.52
4. Step 4: Simplify right side
   1,538.04x = 2,077,339.25
5. Step 5: Solve for x
   x = 2,077,339.25/1,538.04
6. Step 6: Final answer
   x = 1,350.64