Finding the Fourth Proportional to 1,078.47, 1,488.43 and 784.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.47 : 1,488.43 = 784.03 : x
2. Step 2: Convert to fraction form
   1,078.47/1,488.43 = 784.03/x
3. Step 3: Cross multiply
   1,078.47x = 1,488.43 × 784.03
4. Step 4: Simplify right side
   1,078.47x = 1,166,973.77
5. Step 5: Solve for x
   x = 1,166,973.77/1,078.47
6. Step 6: Final answer
   x = 1,082.06