Finding the Fourth Proportional to 2,071.95, 2,859.30 and 1,140.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071.95 : 2,859.30 = 1,140.45 : x
2. Step 2: Convert to fraction form
   2,071.95/2,859.30 = 1,140.45/x
3. Step 3: Cross multiply
   2,071.95x = 2,859.30 × 1,140.45
4. Step 4: Simplify right side
   2,071.95x = 3,260,893.71
5. Step 5: Solve for x
   x = 3,260,893.71/2,071.95
6. Step 6: Final answer
   x = 1,573.83