Finding the Fourth Proportional to 1,354.76, 1,870.63 and 1,039.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,354.76 : 1,870.63 = 1,039.53 : x
2. Step 2: Convert to fraction form
   1,354.76/1,870.63 = 1,039.53/x
3. Step 3: Cross multiply
   1,354.76x = 1,870.63 × 1,039.53
4. Step 4: Simplify right side
   1,354.76x = 1,944,566.39
5. Step 5: Solve for x
   x = 1,944,566.39/1,354.76
6. Step 6: Final answer
   x = 1,435.36