Finding the Fourth Proportional to 101,001.42, 139,330.74 and 77,086.59

Step by Step Solution

1. Step 1: Write the proportion equation
   101,001.42 : 139,330.74 = 77,086.59 : x
2. Step 2: Convert to fraction form
   101,001.42/139,330.74 = 77,086.59/x
3. Step 3: Cross multiply
   101,001.42x = 139,330.74 × 77,086.59
4. Step 4: Simplify right side
   101,001.42x = 10,740,531,628.78
5. Step 5: Solve for x
   x = 10,740,531,628.78/101,001.42
6. Step 6: Final answer
   x = 106,340.40