Finding the Fourth Proportional to 12,957.30, 19,432.31 and 3,595.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,957.30 : 19,432.31 = 3,595.05 : x
2. Step 2: Convert to fraction form
   12,957.30/19,432.31 = 3,595.05/x
3. Step 3: Cross multiply
   12,957.30x = 19,432.31 × 3,595.05
4. Step 4: Simplify right side
   12,957.30x = 69,860,108.09
5. Step 5: Solve for x
   x = 69,860,108.09/12,957.30
6. Step 6: Final answer
   x = 5,391.56