Finding the Fourth Proportional to 89,754.21, 134,483.67 and 71,153.78

Step by Step Solution

1. Step 1: Write the proportion equation
   89,754.21 : 134,483.67 = 71,153.78 : x
2. Step 2: Convert to fraction form
   89,754.21/134,483.67 = 71,153.78/x
3. Step 3: Cross multiply
   89,754.21x = 134,483.67 × 71,153.78
4. Step 4: Simplify right side
   89,754.21x = 9,569,020,796.35
5. Step 5: Solve for x
   x = 9,569,020,796.35/89,754.21
6. Step 6: Final answer
   x = 106,613.62