Finding the Fourth Proportional to 105,172.63, 157,758.94 and 31,300.63

Step by Step Solution

1. Step 1: Write the proportion equation
   105,172.63 : 157,758.94 = 31,300.63 : x
2. Step 2: Convert to fraction form
   105,172.63/157,758.94 = 31,300.63/x
3. Step 3: Cross multiply
   105,172.63x = 157,758.94 × 31,300.63
4. Step 4: Simplify right side
   105,172.63x = 4,937,954,210.13
5. Step 5: Solve for x
   x = 4,937,954,210.13/105,172.63
6. Step 6: Final answer
   x = 46,950.94