Finding the Fourth Proportional to 1,384.76, 1,911.83 and 1,030.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.76 : 1,911.83 = 1,030.28 : x
2. Step 2: Convert to fraction form
   1,384.76/1,911.83 = 1,030.28/x
3. Step 3: Cross multiply
   1,384.76x = 1,911.83 × 1,030.28
4. Step 4: Simplify right side
   1,384.76x = 1,969,705.50
5. Step 5: Solve for x
   x = 1,969,705.50/1,384.76
6. Step 6: Final answer
   x = 1,422.41