Finding the Fourth Proportional to 100,991.38, 139,316.82 and 77,076.52

Step by Step Solution

1. Step 1: Write the proportion equation
   100,991.38 : 139,316.82 = 77,076.52 : x
2. Step 2: Convert to fraction form
   100,991.38/139,316.82 = 77,076.52/x
3. Step 3: Cross multiply
   100,991.38x = 139,316.82 × 77,076.52
4. Step 4: Simplify right side
   100,991.38x = 10,738,055,663.07
5. Step 5: Solve for x
   x = 10,738,055,663.07/100,991.38
6. Step 6: Final answer
   x = 106,326.46