Finding the Fourth Proportional to 54,588.69, 81,774.63 and 42,065.28

Step by Step Solution

1. Step 1: Write the proportion equation
   54,588.69 : 81,774.63 = 42,065.28 : x
2. Step 2: Convert to fraction form
   54,588.69/81,774.63 = 42,065.28/x
3. Step 3: Cross multiply
   54,588.69x = 81,774.63 × 42,065.28
4. Step 4: Simplify right side
   54,588.69x = 3,439,872,707.85
5. Step 5: Solve for x
   x = 3,439,872,707.85/54,588.69
6. Step 6: Final answer
   x = 63,014.38