Finding the Fourth Proportional to 1,913.55, 2,870.29 and 1,090.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,913.55 : 2,870.29 = 1,090.06 : x
2. Step 2: Convert to fraction form
   1,913.55/2,870.29 = 1,090.06/x
3. Step 3: Cross multiply
   1,913.55x = 2,870.29 × 1,090.06
4. Step 4: Simplify right side
   1,913.55x = 3,128,792.52
5. Step 5: Solve for x
   x = 3,128,792.52/1,913.55
6. Step 6: Final answer
   x = 1,635.08