Finding the Fourth Proportional to 76,655.72, 105,783.82 and 42,665.64

Step by Step Solution

1. Step 1: Write the proportion equation
   76,655.72 : 105,783.82 = 42,665.64 : x
2. Step 2: Convert to fraction form
   76,655.72/105,783.82 = 42,665.64/x
3. Step 3: Cross multiply
   76,655.72x = 105,783.82 × 42,665.64
4. Step 4: Simplify right side
   76,655.72x = 4,513,334,118.59
5. Step 5: Solve for x
   x = 4,513,334,118.59/76,655.72
6. Step 6: Final answer
   x = 58,877.98