Finding the Fourth Proportional to 2,101.56, 3,150.58 and 784.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,101.56 : 3,150.58 = 784.58 : x
2. Step 2: Convert to fraction form
   2,101.56/3,150.58 = 784.58/x
3. Step 3: Cross multiply
   2,101.56x = 3,150.58 × 784.58
4. Step 4: Simplify right side
   2,101.56x = 2,471,882.06
5. Step 5: Solve for x
   x = 2,471,882.06/2,101.56
6. Step 6: Final answer
   x = 1,176.21