Finding the Fourth Proportional to 42,749, 64,128.64 and 17,805.96

Step by Step Solution

1. Step 1: Write the proportion equation
   42,749 : 64,128.64 = 17,805.96 : x
2. Step 2: Convert to fraction form
   42,749/64,128.64 = 17,805.96/x
3. Step 3: Cross multiply
   42,749x = 64,128.64 × 17,805.96
4. Step 4: Simplify right side
   42,749x = 1,141,871,998.69
5. Step 5: Solve for x
   x = 1,141,871,998.69/42,749
6. Step 6: Final answer
   x = 26,711.08