Finding the Fourth Proportional to 99,667.38, 137,429.25 and 81,461.62

Step by Step Solution

1. Step 1: Write the proportion equation
   99,667.38 : 137,429.25 = 81,461.62 : x
2. Step 2: Convert to fraction form
   99,667.38/137,429.25 = 81,461.62/x
3. Step 3: Cross multiply
   99,667.38x = 137,429.25 × 81,461.62
4. Step 4: Simplify right side
   99,667.38x = 11,195,209,340.39
5. Step 5: Solve for x
   x = 11,195,209,340.39/99,667.38
6. Step 6: Final answer
   x = 112,325.71