Finding the Fourth Proportional to 1,409.47, 2,115.52 and 1,019.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,409.47 : 2,115.52 = 1,019.86 : x
2. Step 2: Convert to fraction form
   1,409.47/2,115.52 = 1,019.86/x
3. Step 3: Cross multiply
   1,409.47x = 2,115.52 × 1,019.86
4. Step 4: Simplify right side
   1,409.47x = 2,157,526.39
5. Step 5: Solve for x
   x = 2,157,526.39/1,409.47
6. Step 6: Final answer
   x = 1,530.74