Finding the Fourth Proportional to 76,715.57, 105,867.52 and 42,730.58

Step by Step Solution

1. Step 1: Write the proportion equation
   76,715.57 : 105,867.52 = 42,730.58 : x
2. Step 2: Convert to fraction form
   76,715.57/105,867.52 = 42,730.58/x
3. Step 3: Cross multiply
   76,715.57x = 105,867.52 × 42,730.58
4. Step 4: Simplify right side
   76,715.57x = 4,523,780,532.76
5. Step 5: Solve for x
   x = 4,523,780,532.76/76,715.57
6. Step 6: Final answer
   x = 58,968.22