Finding the Fourth Proportional to 1,870.60, 2,803.02 and 1,139.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.60 : 2,803.02 = 1,139.98 : x
2. Step 2: Convert to fraction form
   1,870.60/2,803.02 = 1,139.98/x
3. Step 3: Cross multiply
   1,870.60x = 2,803.02 × 1,139.98
4. Step 4: Simplify right side
   1,870.60x = 3,195,386.74
5. Step 5: Solve for x
   x = 3,195,386.74/1,870.60
6. Step 6: Final answer
   x = 1,708.21