Finding the Fourth Proportional to 12,956.50, 19,437.99 and 5,557.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,956.50 : 19,437.99 = 5,557.30 : x
2. Step 2: Convert to fraction form
   12,956.50/19,437.99 = 5,557.30/x
3. Step 3: Cross multiply
   12,956.50x = 19,437.99 × 5,557.30
4. Step 4: Simplify right side
   12,956.50x = 108,022,741.83
5. Step 5: Solve for x
   x = 108,022,741.83/12,956.50
6. Step 6: Final answer
   x = 8,337.34