Finding the Fourth Proportional to 9,905.42, 13,678.72 and 6,374.82

Step by Step Solution

1. Step 1: Write the proportion equation
   9,905.42 : 13,678.72 = 6,374.82 : x
2. Step 2: Convert to fraction form
   9,905.42/13,678.72 = 6,374.82/x
3. Step 3: Cross multiply
   9,905.42x = 13,678.72 × 6,374.82
4. Step 4: Simplify right side
   9,905.42x = 87,199,377.83
5. Step 5: Solve for x
   x = 87,199,377.83/9,905.42
6. Step 6: Final answer
   x = 8,803.20