Finding the Fourth Proportional to 105,319.71, 145,341.00 and 57,573.05

Step by Step Solution

1. Step 1: Write the proportion equation
   105,319.71 : 145,341.00 = 57,573.05 : x
2. Step 2: Convert to fraction form
   105,319.71/145,341.00 = 57,573.05/x
3. Step 3: Cross multiply
   105,319.71x = 145,341.00 × 57,573.05
4. Step 4: Simplify right side
   105,319.71x = 8,367,724,916.77
5. Step 5: Solve for x
   x = 8,367,724,916.77/105,319.71
6. Step 6: Final answer
   x = 79,450.71