Finding the Fourth Proportional to 10,083.60, 15,127.98 and 7,127.91

Step by Step Solution

1. Step 1: Write the proportion equation
   10,083.60 : 15,127.98 = 7,127.91 : x
2. Step 2: Convert to fraction form
   10,083.60/15,127.98 = 7,127.91/x
3. Step 3: Cross multiply
   10,083.60x = 15,127.98 × 7,127.91
4. Step 4: Simplify right side
   10,083.60x = 107,830,879.92
5. Step 5: Solve for x
   x = 107,830,879.92/10,083.60
6. Step 6: Final answer
   x = 10,693.69