Finding the Fourth Proportional to 101,856.56, 140,570.52 and 56,538.80

Step by Step Solution

1. Step 1: Write the proportion equation
   101,856.56 : 140,570.52 = 56,538.80 : x
2. Step 2: Convert to fraction form
   101,856.56/140,570.52 = 56,538.80/x
3. Step 3: Cross multiply
   101,856.56x = 140,570.52 × 56,538.80
4. Step 4: Simplify right side
   101,856.56x = 7,947,688,516.18
5. Step 5: Solve for x
   x = 7,947,688,516.18/101,856.56
6. Step 6: Final answer
   x = 78,028.24