Finding the Fourth Proportional to 42,799.67, 64,164.70 and 17,858.29

Step by Step Solution

1. Step 1: Write the proportion equation
   42,799.67 : 64,164.70 = 17,858.29 : x
2. Step 2: Convert to fraction form
   42,799.67/64,164.70 = 17,858.29/x
3. Step 3: Cross multiply
   42,799.67x = 64,164.70 × 17,858.29
4. Step 4: Simplify right side
   42,799.67x = 1,145,871,820.36
5. Step 5: Solve for x
   x = 1,145,871,820.36/42,799.67
6. Step 6: Final answer
   x = 26,772.92