Finding the Fourth Proportional to 11,120.02, 15,345.72 and 6,870.10

Step by Step Solution

1. Step 1: Write the proportion equation
   11,120.02 : 15,345.72 = 6,870.10 : x
2. Step 2: Convert to fraction form
   11,120.02/15,345.72 = 6,870.10/x
3. Step 3: Cross multiply
   11,120.02x = 15,345.72 × 6,870.10
4. Step 4: Simplify right side
   11,120.02x = 105,426,621.38
5. Step 5: Solve for x
   x = 105,426,621.38/11,120.02
6. Step 6: Final answer
   x = 9,480.80