Finding the Fourth Proportional to 91,444.50, 137,179.85 and 28,270.12

Step by Step Solution

1. Step 1: Write the proportion equation
   91,444.50 : 137,179.85 = 28,270.12 : x
2. Step 2: Convert to fraction form
   91,444.50/137,179.85 = 28,270.12/x
3. Step 3: Cross multiply
   91,444.50x = 137,179.85 × 28,270.12
4. Step 4: Simplify right side
   91,444.50x = 3,878,089,993.83
5. Step 5: Solve for x
   x = 3,878,089,993.83/91,444.50
6. Step 6: Final answer
   x = 42,409.22