Finding the Fourth Proportional to 105,645.71, 145,792.37 and 57,898.04

Step by Step Solution

1. Step 1: Write the proportion equation
   105,645.71 : 145,792.37 = 57,898.04 : x
2. Step 2: Convert to fraction form
   105,645.71/145,792.37 = 57,898.04/x
3. Step 3: Cross multiply
   105,645.71x = 145,792.37 × 57,898.04
4. Step 4: Simplify right side
   105,645.71x = 8,441,091,451.50
5. Step 5: Solve for x
   x = 8,441,091,451.50/105,645.71
6. Step 6: Final answer
   x = 79,899.99