Finding the Fourth Proportional to 101,199.46, 139,596.72 and 65,389.48

Step by Step Solution

1. Step 1: Write the proportion equation
   101,199.46 : 139,596.72 = 65,389.48 : x
2. Step 2: Convert to fraction form
   101,199.46/139,596.72 = 65,389.48/x
3. Step 3: Cross multiply
   101,199.46x = 139,596.72 × 65,389.48
4. Step 4: Simplify right side
   101,199.46x = 9,128,156,930.51
5. Step 5: Solve for x
   x = 9,128,156,930.51/101,199.46
6. Step 6: Final answer
   x = 90,199.66