Finding the Fourth Proportional to 7,951.30, 10,978.14 and 7,109.32

Step by Step Solution

1. Step 1: Write the proportion equation
   7,951.30 : 10,978.14 = 7,109.32 : x
2. Step 2: Convert to fraction form
   7,951.30/10,978.14 = 7,109.32/x
3. Step 3: Cross multiply
   7,951.30x = 10,978.14 × 7,109.32
4. Step 4: Simplify right side
   7,951.30x = 78,047,110.26
5. Step 5: Solve for x
   x = 78,047,110.26/7,951.30
6. Step 6: Final answer
   x = 9,815.64