Finding the Fourth Proportional to 80,381.34, 110,858.76 and 51,705.72

Step by Step Solution

1. Step 1: Write the proportion equation
   80,381.34 : 110,858.76 = 51,705.72 : x
2. Step 2: Convert to fraction form
   80,381.34/110,858.76 = 51,705.72/x
3. Step 3: Cross multiply
   80,381.34x = 110,858.76 × 51,705.72
4. Step 4: Simplify right side
   80,381.34x = 5,732,032,004.11
5. Step 5: Solve for x
   x = 5,732,032,004.11/80,381.34
6. Step 6: Final answer
   x = 71,310.48