Finding the Fourth Proportional to 106,392.71, 159,612.42 and 31,518.72

Step by Step Solution

1. Step 1: Write the proportion equation
   106,392.71 : 159,612.42 = 31,518.72 : x
2. Step 2: Convert to fraction form
   106,392.71/159,612.42 = 31,518.72/x
3. Step 3: Cross multiply
   106,392.71x = 159,612.42 × 31,518.72
4. Step 4: Simplify right side
   106,392.71x = 5,030,779,174.50
5. Step 5: Solve for x
   x = 5,030,779,174.50/106,392.71
6. Step 6: Final answer
   x = 47,285.00