Finding the Fourth Proportional to 91,131.10, 136,696.72 and 31,160.03

Step by Step Solution

1. Step 1: Write the proportion equation
   91,131.10 : 136,696.72 = 31,160.03 : x
2. Step 2: Convert to fraction form
   91,131.10/136,696.72 = 31,160.03/x
3. Step 3: Cross multiply
   91,131.10x = 136,696.72 × 31,160.03
4. Step 4: Simplify right side
   91,131.10x = 4,259,473,258.50
5. Step 5: Solve for x
   x = 4,259,473,258.50/91,131.10
6. Step 6: Final answer
   x = 46,740.06