Finding the Fourth Proportional to 100,985.43, 139,360.17 and 60,722.25

Step by Step Solution

1. Step 1: Write the proportion equation
   100,985.43 : 139,360.17 = 60,722.25 : x
2. Step 2: Convert to fraction form
   100,985.43/139,360.17 = 60,722.25/x
3. Step 3: Cross multiply
   100,985.43x = 139,360.17 × 60,722.25
4. Step 4: Simplify right side
   100,985.43x = 8,462,263,082.78
5. Step 5: Solve for x
   x = 8,462,263,082.78/100,985.43
6. Step 6: Final answer
   x = 83,796.87