Finding the Fourth Proportional to 2,090.78, 2,885.29 and 1,427.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,090.78 : 2,885.29 = 1,427.61 : x
2. Step 2: Convert to fraction form
   2,090.78/2,885.29 = 1,427.61/x
3. Step 3: Cross multiply
   2,090.78x = 2,885.29 × 1,427.61
4. Step 4: Simplify right side
   2,090.78x = 4,119,061.72
5. Step 5: Solve for x
   x = 4,119,061.72/2,090.78
6. Step 6: Final answer
   x = 1,970.11