Finding the Fourth Proportional to 91,099.48, 136,675.86 and 31,939.96

Step by Step Solution

1. Step 1: Write the proportion equation
   91,099.48 : 136,675.86 = 31,939.96 : x
2. Step 2: Convert to fraction form
   91,099.48/136,675.86 = 31,939.96/x
3. Step 3: Cross multiply
   91,099.48x = 136,675.86 × 31,939.96
4. Step 4: Simplify right side
   91,099.48x = 4,365,421,501.37
5. Step 5: Solve for x
   x = 4,365,421,501.37/91,099.48
6. Step 6: Final answer
   x = 47,919.28