Finding the Fourth Proportional to 42,799.76, 59,071.78 and 28,677.14

Step by Step Solution

1. Step 1: Write the proportion equation
   42,799.76 : 59,071.78 = 28,677.14 : x
2. Step 2: Convert to fraction form
   42,799.76/59,071.78 = 28,677.14/x
3. Step 3: Cross multiply
   42,799.76x = 59,071.78 × 28,677.14
4. Step 4: Simplify right side
   42,799.76x = 1,694,009,705.11
5. Step 5: Solve for x
   x = 1,694,009,705.11/42,799.76
6. Step 6: Final answer
   x = 39,579.89