Finding the Fourth Proportional to 42,773.85, 64,171.73 and 17,805.60

Step by Step Solution

1. Step 1: Write the proportion equation
   42,773.85 : 64,171.73 = 17,805.60 : x
2. Step 2: Convert to fraction form
   42,773.85/64,171.73 = 17,805.60/x
3. Step 3: Cross multiply
   42,773.85x = 64,171.73 × 17,805.60
4. Step 4: Simplify right side
   42,773.85x = 1,142,616,066.66
5. Step 5: Solve for x
   x = 1,142,616,066.66/42,773.85
6. Step 6: Final answer
   x = 26,712.96