Finding the Fourth Proportional to 2,099.70, 3,147.12 and 929.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,099.70 : 3,147.12 = 929.34 : x
2. Step 2: Convert to fraction form
   2,099.70/3,147.12 = 929.34/x
3. Step 3: Cross multiply
   2,099.70x = 3,147.12 × 929.34
4. Step 4: Simplify right side
   2,099.70x = 2,924,744.50
5. Step 5: Solve for x
   x = 2,924,744.50/2,099.70
6. Step 6: Final answer
   x = 1,392.93