Finding the Fourth Proportional to 9,997.58, 15,005.61 and 5,070.75

Step by Step Solution

1. Step 1: Write the proportion equation
   9,997.58 : 15,005.61 = 5,070.75 : x
2. Step 2: Convert to fraction form
   9,997.58/15,005.61 = 5,070.75/x
3. Step 3: Cross multiply
   9,997.58x = 15,005.61 × 5,070.75
4. Step 4: Simplify right side
   9,997.58x = 76,089,696.91
5. Step 5: Solve for x
   x = 76,089,696.91/9,997.58
6. Step 6: Final answer
   x = 7,610.82