Finding the Fourth Proportional to 105,573.76, 145,691.82 and 57,828.83

Step by Step Solution

1. Step 1: Write the proportion equation
   105,573.76 : 145,691.82 = 57,828.83 : x
2. Step 2: Convert to fraction form
   105,573.76/145,691.82 = 57,828.83/x
3. Step 3: Cross multiply
   105,573.76x = 145,691.82 × 57,828.83
4. Step 4: Simplify right side
   105,573.76x = 8,425,186,762.71
5. Step 5: Solve for x
   x = 8,425,186,762.71/105,573.76
6. Step 6: Final answer
   x = 79,803.80