Finding the Fourth Proportional to 99,039.71, 148,603.41 and 39,990.71

Step by Step Solution

1. Step 1: Write the proportion equation
   99,039.71 : 148,603.41 = 39,990.71 : x
2. Step 2: Convert to fraction form
   99,039.71/148,603.41 = 39,990.71/x
3. Step 3: Cross multiply
   99,039.71x = 148,603.41 × 39,990.71
4. Step 4: Simplify right side
   99,039.71x = 5,942,756,245.83
5. Step 5: Solve for x
   x = 5,942,756,245.83/99,039.71
6. Step 6: Final answer
   x = 60,003.77