Finding the Fourth Proportional to 101,601.63, 140,211.38 and 56,280.31

Step by Step Solution

1. Step 1: Write the proportion equation
   101,601.63 : 140,211.38 = 56,280.31 : x
2. Step 2: Convert to fraction form
   101,601.63/140,211.38 = 56,280.31/x
3. Step 3: Cross multiply
   101,601.63x = 140,211.38 × 56,280.31
4. Step 4: Simplify right side
   101,601.63x = 7,891,139,650.53
5. Step 5: Solve for x
   x = 7,891,139,650.53/101,601.63
6. Step 6: Final answer
   x = 77,667.45