Finding the Fourth Proportional to 2,784.18, 4,177.47 and 1,053.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,784.18 : 4,177.47 = 1,053.30 : x
2. Step 2: Convert to fraction form
   2,784.18/4,177.47 = 1,053.30/x
3. Step 3: Cross multiply
   2,784.18x = 4,177.47 × 1,053.30
4. Step 4: Simplify right side
   2,784.18x = 4,400,129.15
5. Step 5: Solve for x
   x = 4,400,129.15/2,784.18
6. Step 6: Final answer
   x = 1,580.40