Finding the Fourth Proportional to 91,150.04, 136,718.94 and 31,172.78

Step by Step Solution

1. Step 1: Write the proportion equation
   91,150.04 : 136,718.94 = 31,172.78 : x
2. Step 2: Convert to fraction form
   91,150.04/136,718.94 = 31,172.78/x
3. Step 3: Cross multiply
   91,150.04x = 136,718.94 × 31,172.78
4. Step 4: Simplify right side
   91,150.04x = 4,261,909,438.45
5. Step 5: Solve for x
   x = 4,261,909,438.45/91,150.04
6. Step 6: Final answer
   x = 46,757.08