Finding the Fourth Proportional to 76,178.68, 105,111.66 and 42,185.52

Step by Step Solution

1. Step 1: Write the proportion equation
   76,178.68 : 105,111.66 = 42,185.52 : x
2. Step 2: Convert to fraction form
   76,178.68/105,111.66 = 42,185.52/x
3. Step 3: Cross multiply
   76,178.68x = 105,111.66 × 42,185.52
4. Step 4: Simplify right side
   76,178.68x = 4,434,190,281.85
5. Step 5: Solve for x
   x = 4,434,190,281.85/76,178.68
6. Step 6: Final answer
   x = 58,207.76