Finding the Fourth Proportional to 42,641.89, 58,869.90 and 28,326.26

Step by Step Solution

1. Step 1: Write the proportion equation
   42,641.89 : 58,869.90 = 28,326.26 : x
2. Step 2: Convert to fraction form
   42,641.89/58,869.90 = 28,326.26/x
3. Step 3: Cross multiply
   42,641.89x = 58,869.90 × 28,326.26
4. Step 4: Simplify right side
   42,641.89x = 1,667,564,240.75
5. Step 5: Solve for x
   x = 1,667,564,240.75/42,641.89
6. Step 6: Final answer
   x = 39,106.25