Finding the Fourth Proportional to 105,571.12, 158,356.80 and 31,699.12

Step by Step Solution

1. Step 1: Write the proportion equation
   105,571.12 : 158,356.80 = 31,699.12 : x
2. Step 2: Convert to fraction form
   105,571.12/158,356.80 = 31,699.12/x
3. Step 3: Cross multiply
   105,571.12x = 158,356.80 × 31,699.12
4. Step 4: Simplify right side
   105,571.12x = 5,019,771,206.02
5. Step 5: Solve for x
   x = 5,019,771,206.02/105,571.12
6. Step 6: Final answer
   x = 47,548.72