Finding the Fourth Proportional to 31,752, 43,777.98 and 20,401.56

Step by Step Solution

1. Step 1: Write the proportion equation
   31,752 : 43,777.98 = 20,401.56 : x
2. Step 2: Convert to fraction form
   31,752/43,777.98 = 20,401.56/x
3. Step 3: Cross multiply
   31,752x = 43,777.98 × 20,401.56
4. Step 4: Simplify right side
   31,752x = 893,139,085.65
5. Step 5: Solve for x
   x = 893,139,085.65/31,752
6. Step 6: Final answer
   x = 28,128.59