Finding the Fourth Proportional to 12,891.45, 19,341.77 and 7,955.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,891.45 : 19,341.77 = 7,955.34 : x
2. Step 2: Convert to fraction form
   12,891.45/19,341.77 = 7,955.34/x
3. Step 3: Cross multiply
   12,891.45x = 19,341.77 × 7,955.34
4. Step 4: Simplify right side
   12,891.45x = 153,870,356.55
5. Step 5: Solve for x
   x = 153,870,356.55/12,891.45
6. Step 6: Final answer
   x = 11,935.85