Finding the Fourth Proportional to 76,654.39, 105,786.10 and 42,664.31

Step by Step Solution

1. Step 1: Write the proportion equation
   76,654.39 : 105,786.10 = 42,664.31 : x
2. Step 2: Convert to fraction form
   76,654.39/105,786.10 = 42,664.31/x
3. Step 3: Cross multiply
   76,654.39x = 105,786.10 × 42,664.31
4. Step 4: Simplify right side
   76,654.39x = 4,513,290,750.77
5. Step 5: Solve for x
   x = 4,513,290,750.77/76,654.39
6. Step 6: Final answer
   x = 58,878.44