Finding the Fourth Proportional to 91,971.06, 137,912.91 and 42,036.34

Step by Step Solution

1. Step 1: Write the proportion equation
   91,971.06 : 137,912.91 = 42,036.34 : x
2. Step 2: Convert to fraction form
   91,971.06/137,912.91 = 42,036.34/x
3. Step 3: Cross multiply
   91,971.06x = 137,912.91 × 42,036.34
4. Step 4: Simplify right side
   91,971.06x = 5,797,353,975.15
5. Step 5: Solve for x
   x = 5,797,353,975.15/91,971.06
6. Step 6: Final answer
   x = 63,034.55