Finding the Fourth Proportional to 1,401.42, 2,100.67 and 784.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.42 : 2,100.67 = 784.22 : x
2. Step 2: Convert to fraction form
   1,401.42/2,100.67 = 784.22/x
3. Step 3: Cross multiply
   1,401.42x = 2,100.67 × 784.22
4. Step 4: Simplify right side
   1,401.42x = 1,647,387.43
5. Step 5: Solve for x
   x = 1,647,387.43/1,401.42
6. Step 6: Final answer
   x = 1,175.51