Finding the Fourth Proportional to 56,331.69, 77,654.91 and 42,879.51

Step by Step Solution

1. Step 1: Write the proportion equation
   56,331.69 : 77,654.91 = 42,879.51 : x
2. Step 2: Convert to fraction form
   56,331.69/77,654.91 = 42,879.51/x
3. Step 3: Cross multiply
   56,331.69x = 77,654.91 × 42,879.51
4. Step 4: Simplify right side
   56,331.69x = 3,329,804,489.89
5. Step 5: Solve for x
   x = 3,329,804,489.89/56,331.69
6. Step 6: Final answer
   x = 59,110.68