Finding the Fourth Proportional to 9,404.61, 12,973.77 and 7,911.99

Step by Step Solution

1. Step 1: Write the proportion equation
   9,404.61 : 12,973.77 = 7,911.99 : x
2. Step 2: Convert to fraction form
   9,404.61/12,973.77 = 7,911.99/x
3. Step 3: Cross multiply
   9,404.61x = 12,973.77 × 7,911.99
4. Step 4: Simplify right side
   9,404.61x = 102,648,338.50
5. Step 5: Solve for x
   x = 102,648,338.50/9,404.61
6. Step 6: Final answer
   x = 10,914.68