Finding the Fourth Proportional to 91,699.05, 137,588.16 and 49,608.78

Step by Step Solution

1. Step 1: Write the proportion equation
   91,699.05 : 137,588.16 = 49,608.78 : x
2. Step 2: Convert to fraction form
   91,699.05/137,588.16 = 49,608.78/x
3. Step 3: Cross multiply
   91,699.05x = 137,588.16 × 49,608.78
4. Step 4: Simplify right side
   91,699.05x = 6,825,580,072.10
5. Step 5: Solve for x
   x = 6,825,580,072.10/91,699.05
6. Step 6: Final answer
   x = 74,434.58