Finding the Fourth Proportional to 105,969.96, 158,911.20 and 42,787.53

Step by Step Solution

1. Step 1: Write the proportion equation
   105,969.96 : 158,911.20 = 42,787.53 : x
2. Step 2: Convert to fraction form
   105,969.96/158,911.20 = 42,787.53/x
3. Step 3: Cross multiply
   105,969.96x = 158,911.20 × 42,787.53
4. Step 4: Simplify right side
   105,969.96x = 6,799,417,737.34
5. Step 5: Solve for x
   x = 6,799,417,737.34/105,969.96
6. Step 6: Final answer
   x = 64,163.63