Finding the Fourth Proportional to 57,051.34, 78,724.79 and 31,553.65

Step by Step Solution

1. Step 1: Write the proportion equation
   57,051.34 : 78,724.79 = 31,553.65 : x
2. Step 2: Convert to fraction form
   57,051.34/78,724.79 = 31,553.65/x
3. Step 3: Cross multiply
   57,051.34x = 78,724.79 × 31,553.65
4. Step 4: Simplify right side
   57,051.34x = 2,484,054,684.03
5. Step 5: Solve for x
   x = 2,484,054,684.03/57,051.34
6. Step 6: Final answer
   x = 43,540.69