Finding the Fourth Proportional to 91,105.29, 136,631.21 and 31,929.93

Step by Step Solution

1. Step 1: Write the proportion equation
   91,105.29 : 136,631.21 = 31,929.93 : x
2. Step 2: Convert to fraction form
   91,105.29/136,631.21 = 31,929.93/x
3. Step 3: Cross multiply
   91,105.29x = 136,631.21 × 31,929.93
4. Step 4: Simplify right side
   91,105.29x = 4,362,624,811.47
5. Step 5: Solve for x
   x = 4,362,624,811.47/91,105.29
6. Step 6: Final answer
   x = 47,885.53