Finding the Fourth Proportional to 76,793.47, 105,981.15 and 42,812.96

Step by Step Solution

1. Step 1: Write the proportion equation
   76,793.47 : 105,981.15 = 42,812.96 : x
2. Step 2: Convert to fraction form
   76,793.47/105,981.15 = 42,812.96/x
3. Step 3: Cross multiply
   76,793.47x = 105,981.15 × 42,812.96
4. Step 4: Simplify right side
   76,793.47x = 4,537,366,735.70
5. Step 5: Solve for x
   x = 4,537,366,735.70/76,793.47
6. Step 6: Final answer
   x = 59,085.32