Finding the Fourth Proportional to 76,659, 105,789.54 and 42,664.92

Step by Step Solution

1. Step 1: Write the proportion equation
   76,659 : 105,789.54 = 42,664.92 : x
2. Step 2: Convert to fraction form
   76,659/105,789.54 = 42,664.92/x
3. Step 3: Cross multiply
   76,659x = 105,789.54 × 42,664.92
4. Step 4: Simplify right side
   76,659x = 4,513,502,260.94
5. Step 5: Solve for x
   x = 4,513,502,260.94/76,659
6. Step 6: Final answer
   x = 58,877.66