Finding the Fourth Proportional to 91,142.16, 136,629.72 and 31,945.56

Step by Step Solution

1. Step 1: Write the proportion equation
   91,142.16 : 136,629.72 = 31,945.56 : x
2. Step 2: Convert to fraction form
   91,142.16/136,629.72 = 31,945.56/x
3. Step 3: Cross multiply
   91,142.16x = 136,629.72 × 31,945.56
4. Step 4: Simplify right side
   91,142.16x = 4,364,712,918.04
5. Step 5: Solve for x
   x = 4,364,712,918.04/91,142.16
6. Step 6: Final answer
   x = 47,889.07