Finding the Fourth Proportional to 2,221.86, 3,064.70 and 1,557.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,221.86 : 3,064.70 = 1,557.55 : x
2. Step 2: Convert to fraction form
   2,221.86/3,064.70 = 1,557.55/x
3. Step 3: Cross multiply
   2,221.86x = 3,064.70 × 1,557.55
4. Step 4: Simplify right side
   2,221.86x = 4,773,443.11
5. Step 5: Solve for x
   x = 4,773,443.11/2,221.86
6. Step 6: Final answer
   x = 2,148.40