Finding the Fourth Proportional to 7,971.10, 10,985.94 and 7,054.54

Step by Step Solution

1. Step 1: Write the proportion equation
   7,971.10 : 10,985.94 = 7,054.54 : x
2. Step 2: Convert to fraction form
   7,971.10/10,985.94 = 7,054.54/x
3. Step 3: Cross multiply
   7,971.10x = 10,985.94 × 7,054.54
4. Step 4: Simplify right side
   7,971.10x = 77,500,753.17
5. Step 5: Solve for x
   x = 77,500,753.17/7,971.10
6. Step 6: Final answer
   x = 9,722.72