Finding the Fourth Proportional to 2,100.53, 3,150.09 and 784.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.53 : 3,150.09 = 784.01 : x
2. Step 2: Convert to fraction form
   2,100.53/3,150.09 = 784.01/x
3. Step 3: Cross multiply
   2,100.53x = 3,150.09 × 784.01
4. Step 4: Simplify right side
   2,100.53x = 2,469,709.94
5. Step 5: Solve for x
   x = 2,469,709.94/2,100.53
6. Step 6: Final answer
   x = 1,175.75