Finding the Fourth Proportional to 2,100.84, 3,150.41 and 784.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.84 : 3,150.41 = 784.50 : x
2. Step 2: Convert to fraction form
   2,100.84/3,150.41 = 784.50/x
3. Step 3: Cross multiply
   2,100.84x = 3,150.41 × 784.50
4. Step 4: Simplify right side
   2,100.84x = 2,471,492.72
5. Step 5: Solve for x
   x = 2,471,492.72/2,100.84
6. Step 6: Final answer
   x = 1,176.43