Finding the Fourth Proportional to 99,419.43, 137,249.64 and 76,707.39

Step by Step Solution

1. Step 1: Write the proportion equation
   99,419.43 : 137,249.64 = 76,707.39 : x
2. Step 2: Convert to fraction form
   99,419.43/137,249.64 = 76,707.39/x
3. Step 3: Cross multiply
   99,419.43x = 137,249.64 × 76,707.39
4. Step 4: Simplify right side
   99,419.43x = 10,528,061,662.84
5. Step 5: Solve for x
   x = 10,528,061,662.84/99,419.43
6. Step 6: Final answer
   x = 105,895.41