Finding the Fourth Proportional to 9,997.67, 15,005.64 and 5,070.71

Step by Step Solution

1. Step 1: Write the proportion equation
   9,997.67 : 15,005.64 = 5,070.71 : x
2. Step 2: Convert to fraction form
   9,997.67/15,005.64 = 5,070.71/x
3. Step 3: Cross multiply
   9,997.67x = 15,005.64 × 5,070.71
4. Step 4: Simplify right side
   9,997.67x = 76,089,173.78
5. Step 5: Solve for x
   x = 76,089,173.78/9,997.67
6. Step 6: Final answer
   x = 7,610.69