Finding the Fourth Proportional to 91,162.78, 136,690.18 and 31,170.04

Step by Step Solution

1. Step 1: Write the proportion equation
   91,162.78 : 136,690.18 = 31,170.04 : x
2. Step 2: Convert to fraction form
   91,162.78/136,690.18 = 31,170.04/x
3. Step 3: Cross multiply
   91,162.78x = 136,690.18 × 31,170.04
4. Step 4: Simplify right side
   91,162.78x = 4,260,638,378.21
5. Step 5: Solve for x
   x = 4,260,638,378.21/91,162.78
6. Step 6: Final answer
   x = 46,736.60