Finding the Fourth Proportional to 1,004.76, 1,516.41 and 978.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,004.76 : 1,516.41 = 978.84 : x
2. Step 2: Convert to fraction form
   1,004.76/1,516.41 = 978.84/x
3. Step 3: Cross multiply
   1,004.76x = 1,516.41 × 978.84
4. Step 4: Simplify right side
   1,004.76x = 1,484,322.76
5. Step 5: Solve for x
   x = 1,484,322.76/1,004.76
6. Step 6: Final answer
   x = 1,477.29