Finding the Fourth Proportional to 12,375.31, 18,559.32 and 3,490.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,375.31 : 18,559.32 = 3,490.05 : x
2. Step 2: Convert to fraction form
   12,375.31/18,559.32 = 3,490.05/x
3. Step 3: Cross multiply
   12,375.31x = 18,559.32 × 3,490.05
4. Step 4: Simplify right side
   12,375.31x = 64,772,954.77
5. Step 5: Solve for x
   x = 64,772,954.77/12,375.31
6. Step 6: Final answer
   x = 5,234.05