Finding the Fourth Proportional to 55,085.34, 76,020.90 and 31,219.74

Step by Step Solution

1. Step 1: Write the proportion equation
   55,085.34 : 76,020.90 = 31,219.74 : x
2. Step 2: Convert to fraction form
   55,085.34/76,020.90 = 31,219.74/x
3. Step 3: Cross multiply
   55,085.34x = 76,020.90 × 31,219.74
4. Step 4: Simplify right side
   55,085.34x = 2,373,352,732.57
5. Step 5: Solve for x
   x = 2,373,352,732.57/55,085.34
6. Step 6: Final answer
   x = 43,085.02