Finding the Fourth Proportional to 10,118.17, 15,175.78 and 7,320.35

Step by Step Solution

1. Step 1: Write the proportion equation
   10,118.17 : 15,175.78 = 7,320.35 : x
2. Step 2: Convert to fraction form
   10,118.17/15,175.78 = 7,320.35/x
3. Step 3: Cross multiply
   10,118.17x = 15,175.78 × 7,320.35
4. Step 4: Simplify right side
   10,118.17x = 111,091,970.13
5. Step 5: Solve for x
   x = 111,091,970.13/10,118.17
6. Step 6: Final answer
   x = 10,979.45