Finding the Fourth Proportional to 105,662.98, 145,818.53 and 57,916.32

Step by Step Solution

1. Step 1: Write the proportion equation
   105,662.98 : 145,818.53 = 57,916.32 : x
2. Step 2: Convert to fraction form
   105,662.98/145,818.53 = 57,916.32/x
3. Step 3: Cross multiply
   105,662.98x = 145,818.53 × 57,916.32
4. Step 4: Simplify right side
   105,662.98x = 8,445,272,645.41
5. Step 5: Solve for x
   x = 8,445,272,645.41/105,662.98
6. Step 6: Final answer
   x = 79,926.50