Finding the Fourth Proportional to 12,930.89, 19,404.83 and 7,091.60

Step by Step Solution

1. Step 1: Write the proportion equation
   12,930.89 : 19,404.83 = 7,091.60 : x
2. Step 2: Convert to fraction form
   12,930.89/19,404.83 = 7,091.60/x
3. Step 3: Cross multiply
   12,930.89x = 19,404.83 × 7,091.60
4. Step 4: Simplify right side
   12,930.89x = 137,611,213.13
5. Step 5: Solve for x
   x = 137,611,213.13/12,930.89
6. Step 6: Final answer
   x = 10,642.06