Finding the Fourth Proportional to 87,673.34, 120,986.78 and 49,432.55

Step by Step Solution

1. Step 1: Write the proportion equation
   87,673.34 : 120,986.78 = 49,432.55 : x
2. Step 2: Convert to fraction form
   87,673.34/120,986.78 = 49,432.55/x
3. Step 3: Cross multiply
   87,673.34x = 120,986.78 × 49,432.55
4. Step 4: Simplify right side
   87,673.34x = 5,980,684,199.59
5. Step 5: Solve for x
   x = 5,980,684,199.59/87,673.34
6. Step 6: Final answer
   x = 68,215.54