Finding the Fourth Proportional to 22,935, 31,601.79 and 21,357.18

Step by Step Solution

1. Step 1: Write the proportion equation
   22,935 : 31,601.79 = 21,357.18 : x
2. Step 2: Convert to fraction form
   22,935/31,601.79 = 21,357.18/x
3. Step 3: Cross multiply
   22,935x = 31,601.79 × 21,357.18
4. Step 4: Simplify right side
   22,935x = 674,925,117.35
5. Step 5: Solve for x
   x = 674,925,117.35/22,935
6. Step 6: Final answer
   x = 29,427.74