Finding the Fourth Proportional to 1,501.16, 2,072.52 and 978.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,501.16 : 2,072.52 = 978.68 : x
2. Step 2: Convert to fraction form
   1,501.16/2,072.52 = 978.68/x
3. Step 3: Cross multiply
   1,501.16x = 2,072.52 × 978.68
4. Step 4: Simplify right side
   1,501.16x = 2,028,333.87
5. Step 5: Solve for x
   x = 2,028,333.87/1,501.16
6. Step 6: Final answer
   x = 1,351.18