Finding the Fourth Proportional to 101,857.94, 140,557.30 and 56,533.72

Step by Step Solution

1. Step 1: Write the proportion equation
   101,857.94 : 140,557.30 = 56,533.72 : x
2. Step 2: Convert to fraction form
   101,857.94/140,557.30 = 56,533.72/x
3. Step 3: Cross multiply
   101,857.94x = 140,557.30 × 56,533.72
4. Step 4: Simplify right side
   101,857.94x = 7,946,227,042.16
5. Step 5: Solve for x
   x = 7,946,227,042.16/101,857.94
6. Step 6: Final answer
   x = 78,012.84