Finding the Fourth Proportional to 7,947.30, 10,972.62 and 7,105.32

Step by Step Solution

1. Step 1: Write the proportion equation
   7,947.30 : 10,972.62 = 7,105.32 : x
2. Step 2: Convert to fraction form
   7,947.30/10,972.62 = 7,105.32/x
3. Step 3: Cross multiply
   7,947.30x = 10,972.62 × 7,105.32
4. Step 4: Simplify right side
   7,947.30x = 77,963,976.34
5. Step 5: Solve for x
   x = 77,963,976.34/7,947.30
6. Step 6: Final answer
   x = 9,810.12