Finding the Fourth Proportional to 1,870.55, 2,580.36 and 1,427.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.55 : 2,580.36 = 1,427.67 : x
2. Step 2: Convert to fraction form
   1,870.55/2,580.36 = 1,427.67/x
3. Step 3: Cross multiply
   1,870.55x = 2,580.36 × 1,427.67
4. Step 4: Simplify right side
   1,870.55x = 3,683,902.56
5. Step 5: Solve for x
   x = 3,683,902.56/1,870.55
6. Step 6: Final answer
   x = 1,969.43