Finding the Fourth Proportional to 39,085.32, 58,413.42 and 28,577.46

Step by Step Solution

1. Step 1: Write the proportion equation
   39,085.32 : 58,413.42 = 28,577.46 : x
2. Step 2: Convert to fraction form
   39,085.32/58,413.42 = 28,577.46/x
3. Step 3: Cross multiply
   39,085.32x = 58,413.42 × 28,577.46
4. Step 4: Simplify right side
   39,085.32x = 1,669,307,173.51
5. Step 5: Solve for x
   x = 1,669,307,173.51/39,085.32
6. Step 6: Final answer
   x = 42,709.31