Finding the Fourth Proportional to 33,870.68, 46,734.90 and 21,288.16

Step by Step Solution

1. Step 1: Write the proportion equation
   33,870.68 : 46,734.90 = 21,288.16 : x
2. Step 2: Convert to fraction form
   33,870.68/46,734.90 = 21,288.16/x
3. Step 3: Cross multiply
   33,870.68x = 46,734.90 × 21,288.16
4. Step 4: Simplify right side
   33,870.68x = 994,900,028.78
5. Step 5: Solve for x
   x = 994,900,028.78/33,870.68
6. Step 6: Final answer
   x = 29,373.49