Finding the Fourth Proportional to 76,146.96, 105,084.20 and 42,612.88

Step by Step Solution

1. Step 1: Write the proportion equation
   76,146.96 : 105,084.20 = 42,612.88 : x
2. Step 2: Convert to fraction form
   76,146.96/105,084.20 = 42,612.88/x
3. Step 3: Cross multiply
   76,146.96x = 105,084.20 × 42,612.88
4. Step 4: Simplify right side
   76,146.96x = 4,477,940,404.50
5. Step 5: Solve for x
   x = 4,477,940,404.50/76,146.96
6. Step 6: Final answer
   x = 58,806.56