Finding the Fourth Proportional to 11,877.80, 17,819.78 and 3,557.48

Step by Step Solution

1. Step 1: Write the proportion equation
   11,877.80 : 17,819.78 = 3,557.48 : x
2. Step 2: Convert to fraction form
   11,877.80/17,819.78 = 3,557.48/x
3. Step 3: Cross multiply
   11,877.80x = 17,819.78 × 3,557.48
4. Step 4: Simplify right side
   11,877.80x = 63,393,510.95
5. Step 5: Solve for x
   x = 63,393,510.95/11,877.80
6. Step 6: Final answer
   x = 5,337.14