Finding the Fourth Proportional to 42,788.02, 64,182.20 and 28,089.94

Step by Step Solution

1. Step 1: Write the proportion equation
   42,788.02 : 64,182.20 = 28,089.94 : x
2. Step 2: Convert to fraction form
   42,788.02/64,182.20 = 28,089.94/x
3. Step 3: Cross multiply
   42,788.02x = 64,182.20 × 28,089.94
4. Step 4: Simplify right side
   42,788.02x = 1,802,873,896.38
5. Step 5: Solve for x
   x = 1,802,873,896.38/42,788.02
6. Step 6: Final answer
   x = 42,135.02