Finding the Fourth Proportional to 2,070.42, 3,105.60 and 1,381.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,070.42 : 3,105.60 = 1,381.50 : x
2. Step 2: Convert to fraction form
   2,070.42/3,105.60 = 1,381.50/x
3. Step 3: Cross multiply
   2,070.42x = 3,105.60 × 1,381.50
4. Step 4: Simplify right side
   2,070.42x = 4,290,386.40
5. Step 5: Solve for x
   x = 4,290,386.40/2,070.42
6. Step 6: Final answer
   x = 2,072.23