Finding the Fourth Proportional to 10,091.67, 13,931.54 and 7,817.95

Step by Step Solution

1. Step 1: Write the proportion equation
   10,091.67 : 13,931.54 = 7,817.95 : x
2. Step 2: Convert to fraction form
   10,091.67/13,931.54 = 7,817.95/x
3. Step 3: Cross multiply
   10,091.67x = 13,931.54 × 7,817.95
4. Step 4: Simplify right side
   10,091.67x = 108,916,082.52
5. Step 5: Solve for x
   x = 108,916,082.52/10,091.67
6. Step 6: Final answer
   x = 10,792.68