Finding the Fourth Proportional to 12,956.22, 19,437.21 and 3,721.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,956.22 : 19,437.21 = 3,721.50 : x
2. Step 2: Convert to fraction form
   12,956.22/19,437.21 = 3,721.50/x
3. Step 3: Cross multiply
   12,956.22x = 19,437.21 × 3,721.50
4. Step 4: Simplify right side
   12,956.22x = 72,335,577.02
5. Step 5: Solve for x
   x = 72,335,577.02/12,956.22
6. Step 6: Final answer
   x = 5,583.08