Finding the Fourth Proportional to 101,969.50, 140,715.38 and 56,647.59

Step by Step Solution

1. Step 1: Write the proportion equation
   101,969.50 : 140,715.38 = 56,647.59 : x
2. Step 2: Convert to fraction form
   101,969.50/140,715.38 = 56,647.59/x
3. Step 3: Cross multiply
   101,969.50x = 140,715.38 × 56,647.59
4. Step 4: Simplify right side
   101,969.50x = 7,971,186,869.70
5. Step 5: Solve for x
   x = 7,971,186,869.70/101,969.50
6. Step 6: Final answer
   x = 78,172.27