Finding the Fourth Proportional to 6,611.78, 9,916.72 and 1,930.55

Step by Step Solution

1. Step 1: Write the proportion equation
   6,611.78 : 9,916.72 = 1,930.55 : x
2. Step 2: Convert to fraction form
   6,611.78/9,916.72 = 1,930.55/x
3. Step 3: Cross multiply
   6,611.78x = 9,916.72 × 1,930.55
4. Step 4: Simplify right side
   6,611.78x = 19,144,669.39
5. Step 5: Solve for x
   x = 19,144,669.39/6,611.78
6. Step 6: Final answer
   x = 2,895.54