Finding the Fourth Proportional to 101,510.69, 140,085.01 and 56,191.79

Step by Step Solution

1. Step 1: Write the proportion equation
   101,510.69 : 140,085.01 = 56,191.79 : x
2. Step 2: Convert to fraction form
   101,510.69/140,085.01 = 56,191.79/x
3. Step 3: Cross multiply
   101,510.69x = 140,085.01 × 56,191.79
4. Step 4: Simplify right side
   101,510.69x = 7,871,627,884.52
5. Step 5: Solve for x
   x = 7,871,627,884.52/101,510.69
6. Step 6: Final answer
   x = 77,544.82