Finding the Fourth Proportional to 78,426.84, 108,230.04 and 42,617.40

Step by Step Solution

1. Step 1: Write the proportion equation
   78,426.84 : 108,230.04 = 42,617.40 : x
2. Step 2: Convert to fraction form
   78,426.84/108,230.04 = 42,617.40/x
3. Step 3: Cross multiply
   78,426.84x = 108,230.04 × 42,617.40
4. Step 4: Simplify right side
   78,426.84x = 4,612,482,906.70
5. Step 5: Solve for x
   x = 4,612,482,906.70/78,426.84
6. Step 6: Final answer
   x = 58,812.56