Finding the Fourth Proportional to 101,986.44, 140,736.72 and 56,667.61

Step by Step Solution

1. Step 1: Write the proportion equation
   101,986.44 : 140,736.72 = 56,667.61 : x
2. Step 2: Convert to fraction form
   101,986.44/140,736.72 = 56,667.61/x
3. Step 3: Cross multiply
   101,986.44x = 140,736.72 × 56,667.61
4. Step 4: Simplify right side
   101,986.44x = 7,975,213,561.64
5. Step 5: Solve for x
   x = 7,975,213,561.64/101,986.44
6. Step 6: Final answer
   x = 78,198.76