Finding the Fourth Proportional to 3,914.07, 5,870.53 and 1,139.99

Step by Step Solution

1. Step 1: Write the proportion equation
   3,914.07 : 5,870.53 = 1,139.99 : x
2. Step 2: Convert to fraction form
   3,914.07/5,870.53 = 1,139.99/x
3. Step 3: Cross multiply
   3,914.07x = 5,870.53 × 1,139.99
4. Step 4: Simplify right side
   3,914.07x = 6,692,357.32
5. Step 5: Solve for x
   x = 6,692,357.32/3,914.07
6. Step 6: Final answer
   x = 1,709.82