Finding the Fourth Proportional to 91,123, 136,685.72 and 31,960.40

Step by Step Solution

1. Step 1: Write the proportion equation
   91,123 : 136,685.72 = 31,960.40 : x
2. Step 2: Convert to fraction form
   91,123/136,685.72 = 31,960.40/x
3. Step 3: Cross multiply
   91,123x = 136,685.72 × 31,960.40
4. Step 4: Simplify right side
   91,123x = 4,368,530,285.49
5. Step 5: Solve for x
   x = 4,368,530,285.49/91,123
6. Step 6: Final answer
   x = 47,941.03