Finding the Fourth Proportional to 3,870.71, 5,806.48 and 1,237.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.71 : 5,806.48 = 1,237.30 : x
2. Step 2: Convert to fraction form
   3,870.71/5,806.48 = 1,237.30/x
3. Step 3: Cross multiply
   3,870.71x = 5,806.48 × 1,237.30
4. Step 4: Simplify right side
   3,870.71x = 7,184,328.67
5. Step 5: Solve for x
   x = 7,184,328.67/3,870.71
6. Step 6: Final answer
   x = 1,856.08