Finding the Fourth Proportional to 2,334.47, 3,221.56 and 1,272.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,334.47 : 3,221.56 = 1,272.30 : x
2. Step 2: Convert to fraction form
   2,334.47/3,221.56 = 1,272.30/x
3. Step 3: Cross multiply
   2,334.47x = 3,221.56 × 1,272.30
4. Step 4: Simplify right side
   2,334.47x = 4,098,784.43
5. Step 5: Solve for x
   x = 4,098,784.43/2,334.47
6. Step 6: Final answer
   x = 1,755.77