Finding the Fourth Proportional to 105,624.76, 145,762.86 and 57,880.12

Step by Step Solution

1. Step 1: Write the proportion equation
   105,624.76 : 145,762.86 = 57,880.12 : x
2. Step 2: Convert to fraction form
   105,624.76/145,762.86 = 57,880.12/x
3. Step 3: Cross multiply
   105,624.76x = 145,762.86 × 57,880.12
4. Step 4: Simplify right side
   105,624.76x = 8,436,771,828.34
5. Step 5: Solve for x
   x = 8,436,771,828.34/105,624.76
6. Step 6: Final answer
   x = 79,874.94