Finding the Fourth Proportional to 99,419.94, 137,250.34 and 76,707.90

Step by Step Solution

1. Step 1: Write the proportion equation
   99,419.94 : 137,250.34 = 76,707.90 : x
2. Step 2: Convert to fraction form
   99,419.94/137,250.34 = 76,707.90/x
3. Step 3: Cross multiply
   99,419.94x = 137,250.34 × 76,707.90
4. Step 4: Simplify right side
   99,419.94x = 10,528,185,355.69
5. Step 5: Solve for x
   x = 10,528,185,355.69/99,419.94
6. Step 6: Final answer
   x = 105,896.11