Finding the Fourth Proportional to 105,308, 157,987.92 and 31,436

Step by Step Solution

1. Step 1: Write the proportion equation
   105,308 : 157,987.92 = 31,436 : x
2. Step 2: Convert to fraction form
   105,308/157,987.92 = 31,436/x
3. Step 3: Cross multiply
   105,308x = 157,987.92 × 31,436
4. Step 4: Simplify right side
   105,308x = 4,966,508,253.12
5. Step 5: Solve for x
   x = 4,966,508,253.12/105,308
6. Step 6: Final answer
   x = 47,161.74