Finding the Fourth Proportional to 42,984.06, 59,342.69 and 28,640.10

Step by Step Solution

1. Step 1: Write the proportion equation
   42,984.06 : 59,342.69 = 28,640.10 : x
2. Step 2: Convert to fraction form
   42,984.06/59,342.69 = 28,640.10/x
3. Step 3: Cross multiply
   42,984.06x = 59,342.69 × 28,640.10
4. Step 4: Simplify right side
   42,984.06x = 1,699,580,575.87
5. Step 5: Solve for x
   x = 1,699,580,575.87/42,984.06
6. Step 6: Final answer
   x = 39,539.79