Finding the Fourth Proportional to 42,495.74, 58,582.64 and 28,131.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,495.74 : 58,582.64 = 28,131.50 : x
2. Step 2: Convert to fraction form
   42,495.74/58,582.64 = 28,131.50/x
3. Step 3: Cross multiply
   42,495.74x = 58,582.64 × 28,131.50
4. Step 4: Simplify right side
   42,495.74x = 1,648,017,753.95
5. Step 5: Solve for x
   x = 1,648,017,753.95/42,495.74
6. Step 6: Final answer
   x = 38,780.78