Finding the Fourth Proportional to 23,156.84, 31,961.69 and 13,091.13

Step by Step Solution

1. Step 1: Write the proportion equation
   23,156.84 : 31,961.69 = 13,091.13 : x
2. Step 2: Convert to fraction form
   23,156.84/31,961.69 = 13,091.13/x
3. Step 3: Cross multiply
   23,156.84x = 31,961.69 × 13,091.13
4. Step 4: Simplify right side
   23,156.84x = 418,414,671.54
5. Step 5: Solve for x
   x = 418,414,671.54/23,156.84
6. Step 6: Final answer
   x = 18,068.73