Finding the Fourth Proportional to 99,849.96, 149,010.72 and 89,200.39

Step by Step Solution

1. Step 1: Write the proportion equation
   99,849.96 : 149,010.72 = 89,200.39 : x
2. Step 2: Convert to fraction form
   99,849.96/149,010.72 = 89,200.39/x
3. Step 3: Cross multiply
   99,849.96x = 149,010.72 × 89,200.39
4. Step 4: Simplify right side
   99,849.96x = 13,291,814,338.18
5. Step 5: Solve for x
   x = 13,291,814,338.18/99,849.96
6. Step 6: Final answer
   x = 133,117.87