Finding the Fourth Proportional to 3,603.90, 5,402.61 and 1,870.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,603.90 : 5,402.61 = 1,870.50 : x
2. Step 2: Convert to fraction form
   3,603.90/5,402.61 = 1,870.50/x
3. Step 3: Cross multiply
   3,603.90x = 5,402.61 × 1,870.50
4. Step 4: Simplify right side
   3,603.90x = 10,105,582.01
5. Step 5: Solve for x
   x = 10,105,582.01/3,603.90
6. Step 6: Final answer
   x = 2,804.07