Finding the Fourth Proportional to 1,536.94, 2,120.52 and 978.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,536.94 : 2,120.52 = 978.04 : x
2. Step 2: Convert to fraction form
   1,536.94/2,120.52 = 978.04/x
3. Step 3: Cross multiply
   1,536.94x = 2,120.52 × 978.04
4. Step 4: Simplify right side
   1,536.94x = 2,073,953.38
5. Step 5: Solve for x
   x = 2,073,953.38/1,536.94
6. Step 6: Final answer
   x = 1,349.40