Finding the Fourth Proportional to 7,878.74, 10,872.72 and 4,342.07

Step by Step Solution

1. Step 1: Write the proportion equation
   7,878.74 : 10,872.72 = 4,342.07 : x
2. Step 2: Convert to fraction form
   7,878.74/10,872.72 = 4,342.07/x
3. Step 3: Cross multiply
   7,878.74x = 10,872.72 × 4,342.07
4. Step 4: Simplify right side
   7,878.74x = 47,210,111.33
5. Step 5: Solve for x
   x = 47,210,111.33/7,878.74
6. Step 6: Final answer
   x = 5,992.09