Finding the Fourth Proportional to 78,426.57, 108,228.81 and 42,617.05

Step by Step Solution

1. Step 1: Write the proportion equation
   78,426.57 : 108,228.81 = 42,617.05 : x
2. Step 2: Convert to fraction form
   78,426.57/108,228.81 = 42,617.05/x
3. Step 3: Cross multiply
   78,426.57x = 108,228.81 × 42,617.05
4. Step 4: Simplify right side
   78,426.57x = 4,612,392,607.21
5. Step 5: Solve for x
   x = 4,612,392,607.21/78,426.57
6. Step 6: Final answer
   x = 58,811.61