Finding the Fourth Proportional to 81,688.42, 112,754.49 and 47,706.10

Step by Step Solution

1. Step 1: Write the proportion equation
   81,688.42 : 112,754.49 = 47,706.10 : x
2. Step 2: Convert to fraction form
   81,688.42/112,754.49 = 47,706.10/x
3. Step 3: Cross multiply
   81,688.42x = 112,754.49 × 47,706.10
4. Step 4: Simplify right side
   81,688.42x = 5,379,076,975.39
5. Step 5: Solve for x
   x = 5,379,076,975.39/81,688.42
6. Step 6: Final answer
   x = 65,848.71