Finding the Fourth Proportional to 2,101.10, 3,151.15 and 784.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,101.10 : 3,151.15 = 784.98 : x
2. Step 2: Convert to fraction form
   2,101.10/3,151.15 = 784.98/x
3. Step 3: Cross multiply
   2,101.10x = 3,151.15 × 784.98
4. Step 4: Simplify right side
   2,101.10x = 2,473,601.04
5. Step 5: Solve for x
   x = 2,473,601.04/2,101.10
6. Step 6: Final answer
   x = 1,177.29