Finding the Fourth Proportional to 99,416.16, 137,104.25 and 76,698.50

Step by Step Solution

1. Step 1: Write the proportion equation
   99,416.16 : 137,104.25 = 76,698.50 : x
2. Step 2: Convert to fraction form
   99,416.16/137,104.25 = 76,698.50/x
3. Step 3: Cross multiply
   99,416.16x = 137,104.25 × 76,698.50
4. Step 4: Simplify right side
   99,416.16x = 10,515,689,249.61
5. Step 5: Solve for x
   x = 10,515,689,249.61/99,416.16
6. Step 6: Final answer
   x = 105,774.45