Finding the Fourth Proportional to 42,110.86, 58,065.79 and 28,689.97

Step by Step Solution

1. Step 1: Write the proportion equation
   42,110.86 : 58,065.79 = 28,689.97 : x
2. Step 2: Convert to fraction form
   42,110.86/58,065.79 = 28,689.97/x
3. Step 3: Cross multiply
   42,110.86x = 58,065.79 × 28,689.97
4. Step 4: Simplify right side
   42,110.86x = 1,665,905,773.13
5. Step 5: Solve for x
   x = 1,665,905,773.13/42,110.86
6. Step 6: Final answer
   x = 39,560.00