Finding the Fourth Proportional to 91,150.50, 136,739.42 and 31,975.74

Step by Step Solution

1. Step 1: Write the proportion equation
   91,150.50 : 136,739.42 = 31,975.74 : x
2. Step 2: Convert to fraction form
   91,150.50/136,739.42 = 31,975.74/x
3. Step 3: Cross multiply
   91,150.50x = 136,739.42 × 31,975.74
4. Step 4: Simplify right side
   91,150.50x = 4,372,343,981.79
5. Step 5: Solve for x
   x = 4,372,343,981.79/91,150.50
6. Step 6: Final answer
   x = 47,968.41