Finding the Fourth Proportional to 105,719.59, 145,895.12 and 57,973.04

Step by Step Solution

1. Step 1: Write the proportion equation
   105,719.59 : 145,895.12 = 57,973.04 : x
2. Step 2: Convert to fraction form
   105,719.59/145,895.12 = 57,973.04/x
3. Step 3: Cross multiply
   105,719.59x = 145,895.12 × 57,973.04
4. Step 4: Simplify right side
   105,719.59x = 8,457,983,627.56
5. Step 5: Solve for x
   x = 8,457,983,627.56/105,719.59
6. Step 6: Final answer
   x = 80,003.94