Finding the Fourth Proportional to 13,930.59, 19,223.71 and 7,961.91

Step by Step Solution

1. Step 1: Write the proportion equation
   13,930.59 : 19,223.71 = 7,961.91 : x
2. Step 2: Convert to fraction form
   13,930.59/19,223.71 = 7,961.91/x
3. Step 3: Cross multiply
   13,930.59x = 19,223.71 × 7,961.91
4. Step 4: Simplify right side
   13,930.59x = 153,057,356.89
5. Step 5: Solve for x
   x = 153,057,356.89/13,930.59
6. Step 6: Final answer
   x = 10,987.14