Finding the Fourth Proportional to 31,159.46, 42,967.32 and 20,535.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,159.46 : 42,967.32 = 20,535.50 : x
2. Step 2: Convert to fraction form
   31,159.46/42,967.32 = 20,535.50/x
3. Step 3: Cross multiply
   31,159.46x = 42,967.32 × 20,535.50
4. Step 4: Simplify right side
   31,159.46x = 882,355,399.86
5. Step 5: Solve for x
   x = 882,355,399.86/31,159.46
6. Step 6: Final answer
   x = 28,317.42