Finding the Fourth Proportional to 101,113.61, 139,581.50 and 65,321.06

Step by Step Solution

1. Step 1: Write the proportion equation
   101,113.61 : 139,581.50 = 65,321.06 : x
2. Step 2: Convert to fraction form
   101,113.61/139,581.50 = 65,321.06/x
3. Step 3: Cross multiply
   101,113.61x = 139,581.50 × 65,321.06
4. Step 4: Simplify right side
   101,113.61x = 9,117,610,511.88
5. Step 5: Solve for x
   x = 9,117,610,511.88/101,113.61
6. Step 6: Final answer
   x = 90,171.95