Finding the Fourth Proportional to 106,405.72, 159,559.58 and 31,499.08

Step by Step Solution

1. Step 1: Write the proportion equation
   106,405.72 : 159,559.58 = 31,499.08 : x
2. Step 2: Convert to fraction form
   106,405.72/159,559.58 = 31,499.08/x
3. Step 3: Cross multiply
   106,405.72x = 159,559.58 × 31,499.08
4. Step 4: Simplify right side
   106,405.72x = 5,025,979,975.19
5. Step 5: Solve for x
   x = 5,025,979,975.19/106,405.72
6. Step 6: Final answer
   x = 47,234.11