Finding the Fourth Proportional to 9,951.34, 14,929.74 and 7,878.25

Step by Step Solution

1. Step 1: Write the proportion equation
   9,951.34 : 14,929.74 = 7,878.25 : x
2. Step 2: Convert to fraction form
   9,951.34/14,929.74 = 7,878.25/x
3. Step 3: Cross multiply
   9,951.34x = 14,929.74 × 7,878.25
4. Step 4: Simplify right side
   9,951.34x = 117,620,186.83
5. Step 5: Solve for x
   x = 117,620,186.83/9,951.34
6. Step 6: Final answer
   x = 11,819.54