Finding the Fourth Proportional to 105,492.38, 158,238.56 and 31,620.38

Step by Step Solution

1. Step 1: Write the proportion equation
   105,492.38 : 158,238.56 = 31,620.38 : x
2. Step 2: Convert to fraction form
   105,492.38/158,238.56 = 31,620.38/x
3. Step 3: Cross multiply
   105,492.38x = 158,238.56 × 31,620.38
4. Step 4: Simplify right side
   105,492.38x = 5,003,562,685.71
5. Step 5: Solve for x
   x = 5,003,562,685.71/105,492.38
6. Step 6: Final answer
   x = 47,430.56