Finding the Fourth Proportional to 105,662.73, 145,818.18 and 57,916.07

Step by Step Solution

1. Step 1: Write the proportion equation
   105,662.73 : 145,818.18 = 57,916.07 : x
2. Step 2: Convert to fraction form
   105,662.73/145,818.18 = 57,916.07/x
3. Step 3: Cross multiply
   105,662.73x = 145,818.18 × 57,916.07
4. Step 4: Simplify right side
   105,662.73x = 8,445,215,191.06
5. Step 5: Solve for x
   x = 8,445,215,191.06/105,662.73
6. Step 6: Final answer
   x = 79,926.15