Finding the Fourth Proportional to 101,493.54, 140,061.42 and 56,170.80

Step by Step Solution

1. Step 1: Write the proportion equation
   101,493.54 : 140,061.42 = 56,170.80 : x
2. Step 2: Convert to fraction form
   101,493.54/140,061.42 = 56,170.80/x
3. Step 3: Cross multiply
   101,493.54x = 140,061.42 × 56,170.80
4. Step 4: Simplify right side
   101,493.54x = 7,867,362,010.54
5. Step 5: Solve for x
   x = 7,867,362,010.54/101,493.54
6. Step 6: Final answer
   x = 77,515.89