Finding the Fourth Proportional to 13,295.79, 19,945.88 and 4,978.71

Step by Step Solution

1. Step 1: Write the proportion equation
   13,295.79 : 19,945.88 = 4,978.71 : x
2. Step 2: Convert to fraction form
   13,295.79/19,945.88 = 4,978.71/x
3. Step 3: Cross multiply
   13,295.79x = 19,945.88 × 4,978.71
4. Step 4: Simplify right side
   13,295.79x = 99,304,727.32
5. Step 5: Solve for x
   x = 99,304,727.32/13,295.79
6. Step 6: Final answer
   x = 7,468.89