Finding the Fourth Proportional to 101,859.94, 140,560.06 and 56,535.72

Step by Step Solution

1. Step 1: Write the proportion equation
   101,859.94 : 140,560.06 = 56,535.72 : x
2. Step 2: Convert to fraction form
   101,859.94/140,560.06 = 56,535.72/x
3. Step 3: Cross multiply
   101,859.94x = 140,560.06 × 56,535.72
4. Step 4: Simplify right side
   101,859.94x = 7,946,664,195.34
5. Step 5: Solve for x
   x = 7,946,664,195.34/101,859.94
6. Step 6: Final answer
   x = 78,015.60