Finding the Fourth Proportional to 12,930.76, 19,404.65 and 7,091.47

Step by Step Solution

1. Step 1: Write the proportion equation
   12,930.76 : 19,404.65 = 7,091.47 : x
2. Step 2: Convert to fraction form
   12,930.76/19,404.65 = 7,091.47/x
3. Step 3: Cross multiply
   12,930.76x = 19,404.65 × 7,091.47
4. Step 4: Simplify right side
   12,930.76x = 137,607,493.34
5. Step 5: Solve for x
   x = 137,607,493.34/12,930.76
6. Step 6: Final answer
   x = 10,641.87