Finding the Fourth Proportional to 978.66, 1,471.50 and 894.78

Step by Step Solution

1. Step 1: Write the proportion equation
   978.66 : 1,471.50 = 894.78 : x
2. Step 2: Convert to fraction form
   978.66/1,471.50 = 894.78/x
3. Step 3: Cross multiply
   978.66x = 1,471.50 × 894.78
4. Step 4: Simplify right side
   978.66x = 1,316,668.77
5. Step 5: Solve for x
   x = 1,316,668.77/978.66
6. Step 6: Final answer
   x = 1,345.38