Finding the Fourth Proportional to 42,799.42, 64,164.33 and 17,858.04

Step by Step Solution

1. Step 1: Write the proportion equation
   42,799.42 : 64,164.33 = 17,858.04 : x
2. Step 2: Convert to fraction form
   42,799.42/64,164.33 = 17,858.04/x
3. Step 3: Cross multiply
   42,799.42x = 64,164.33 × 17,858.04
4. Step 4: Simplify right side
   42,799.42x = 1,145,849,082.42
5. Step 5: Solve for x
   x = 1,145,849,082.42/42,799.42
6. Step 6: Final answer
   x = 26,772.54