Finding the Fourth Proportional to 105,555.82, 145,663.77 and 57,807.94

Step by Step Solution

1. Step 1: Write the proportion equation
   105,555.82 : 145,663.77 = 57,807.94 : x
2. Step 2: Convert to fraction form
   105,555.82/145,663.77 = 57,807.94/x
3. Step 3: Cross multiply
   105,555.82x = 145,663.77 × 57,807.94
4. Step 4: Simplify right side
   105,555.82x = 8,420,522,476.33
5. Step 5: Solve for x
   x = 8,420,522,476.33/105,555.82
6. Step 6: Final answer
   x = 79,773.17