Finding the Fourth Proportional to 42,868.25, 59,178.69 and 28,551.90

Step by Step Solution

1. Step 1: Write the proportion equation
   42,868.25 : 59,178.69 = 28,551.90 : x
2. Step 2: Convert to fraction form
   42,868.25/59,178.69 = 28,551.90/x
3. Step 3: Cross multiply
   42,868.25x = 59,178.69 × 28,551.90
4. Step 4: Simplify right side
   42,868.25x = 1,689,664,039.01
5. Step 5: Solve for x
   x = 1,689,664,039.01/42,868.25
6. Step 6: Final answer
   x = 39,415.28