Finding the Fourth Proportional to 42,717.05, 64,080.70 and 17,773.98

Step by Step Solution

1. Step 1: Write the proportion equation
   42,717.05 : 64,080.70 = 17,773.98 : x
2. Step 2: Convert to fraction form
   42,717.05/64,080.70 = 17,773.98/x
3. Step 3: Cross multiply
   42,717.05x = 64,080.70 × 17,773.98
4. Step 4: Simplify right side
   42,717.05x = 1,138,969,080.19
5. Step 5: Solve for x
   x = 1,138,969,080.19/42,717.05
6. Step 6: Final answer
   x = 26,663.10