Finding the Fourth Proportional to 2,070.50, 3,105.42 and 837.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,070.50 : 3,105.42 = 837.60 : x
2. Step 2: Convert to fraction form
   2,070.50/3,105.42 = 837.60/x
3. Step 3: Cross multiply
   2,070.50x = 3,105.42 × 837.60
4. Step 4: Simplify right side
   2,070.50x = 2,601,099.79
5. Step 5: Solve for x
   x = 2,601,099.79/2,070.50
6. Step 6: Final answer
   x = 1,256.27