Finding the Fourth Proportional to 105,880.35, 158,818.47 and 42,699.05

Step by Step Solution

1. Step 1: Write the proportion equation
   105,880.35 : 158,818.47 = 42,699.05 : x
2. Step 2: Convert to fraction form
   105,880.35/158,818.47 = 42,699.05/x
3. Step 3: Cross multiply
   105,880.35x = 158,818.47 × 42,699.05
4. Step 4: Simplify right side
   105,880.35x = 6,781,398,188.50
5. Step 5: Solve for x
   x = 6,781,398,188.50/105,880.35
6. Step 6: Final answer
   x = 64,047.75