Finding the Fourth Proportional to 109,508.45, 164,280.42 and 42,912.47

Step by Step Solution

1. Step 1: Write the proportion equation
   109,508.45 : 164,280.42 = 42,912.47 : x
2. Step 2: Convert to fraction form
   109,508.45/164,280.42 = 42,912.47/x
3. Step 3: Cross multiply
   109,508.45x = 164,280.42 × 42,912.47
4. Step 4: Simplify right side
   109,508.45x = 7,049,677,773.44
5. Step 5: Solve for x
   x = 7,049,677,773.44/109,508.45
6. Step 6: Final answer
   x = 64,375.65