Finding the Fourth Proportional to 42,787.14, 64,180.89 and 28,089.06

Step by Step Solution

1. Step 1: Write the proportion equation
   42,787.14 : 64,180.89 = 28,089.06 : x
2. Step 2: Convert to fraction form
   42,787.14/64,180.89 = 28,089.06/x
3. Step 3: Cross multiply
   42,787.14x = 64,180.89 × 28,089.06
4. Step 4: Simplify right side
   42,787.14x = 1,802,780,870.06
5. Step 5: Solve for x
   x = 1,802,780,870.06/42,787.14
6. Step 6: Final answer
   x = 42,133.71