Finding the Fourth Proportional to 9,880.72, 14,799.32 and 7,112.80

Step by Step Solution

1. Step 1: Write the proportion equation
   9,880.72 : 14,799.32 = 7,112.80 : x
2. Step 2: Convert to fraction form
   9,880.72/14,799.32 = 7,112.80/x
3. Step 3: Cross multiply
   9,880.72x = 14,799.32 × 7,112.80
4. Step 4: Simplify right side
   9,880.72x = 105,264,603.30
5. Step 5: Solve for x
   x = 105,264,603.30/9,880.72
6. Step 6: Final answer
   x = 10,653.54