Finding the Fourth Proportional to 69,128.73, 103,748.47 and 31,706.44

Step by Step Solution

1. Step 1: Write the proportion equation
   69,128.73 : 103,748.47 = 31,706.44 : x
2. Step 2: Convert to fraction form
   69,128.73/103,748.47 = 31,706.44/x
3. Step 3: Cross multiply
   69,128.73x = 103,748.47 × 31,706.44
4. Step 4: Simplify right side
   69,128.73x = 3,289,494,300.51
5. Step 5: Solve for x
   x = 3,289,494,300.51/69,128.73
6. Step 6: Final answer
   x = 47,585.05