Finding the Fourth Proportional to 76,659.84, 105,789.68 and 42,667.72

Step by Step Solution

1. Step 1: Write the proportion equation
   76,659.84 : 105,789.68 = 42,667.72 : x
2. Step 2: Convert to fraction form
   76,659.84/105,789.68 = 42,667.72/x
3. Step 3: Cross multiply
   76,659.84x = 105,789.68 × 42,667.72
4. Step 4: Simplify right side
   76,659.84x = 4,513,804,445.13
5. Step 5: Solve for x
   x = 4,513,804,445.13/76,659.84
6. Step 6: Final answer
   x = 58,880.95