Finding the Fourth Proportional to 1,870.73, 2,580.63 and 1,427.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.73 : 2,580.63 = 1,427.86 : x
2. Step 2: Convert to fraction form
   1,870.73/2,580.63 = 1,427.86/x
3. Step 3: Cross multiply
   1,870.73x = 2,580.63 × 1,427.86
4. Step 4: Simplify right side
   1,870.73x = 3,684,776.22
5. Step 5: Solve for x
   x = 3,684,776.22/1,870.73
6. Step 6: Final answer
   x = 1,969.70