Finding the Fourth Proportional to 1,384.02, 2,071.17 and 1,056.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.02 : 2,071.17 = 1,056.78 : x
2. Step 2: Convert to fraction form
   1,384.02/2,071.17 = 1,056.78/x
3. Step 3: Cross multiply
   1,384.02x = 2,071.17 × 1,056.78
4. Step 4: Simplify right side
   1,384.02x = 2,188,771.03
5. Step 5: Solve for x
   x = 2,188,771.03/1,384.02
6. Step 6: Final answer
   x = 1,581.46