Finding the Fourth Proportional to 1,384.47, 1,910.93 and 964.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.47 : 1,910.93 = 964.89 : x
2. Step 2: Convert to fraction form
   1,384.47/1,910.93 = 964.89/x
3. Step 3: Cross multiply
   1,384.47x = 1,910.93 × 964.89
4. Step 4: Simplify right side
   1,384.47x = 1,843,832.42
5. Step 5: Solve for x
   x = 1,843,832.42/1,384.47
6. Step 6: Final answer
   x = 1,331.80