Finding the Fourth Proportional to 33,320.72, 45,978.15 and 21,400.19

Step by Step Solution

1. Step 1: Write the proportion equation
   33,320.72 : 45,978.15 = 21,400.19 : x
2. Step 2: Convert to fraction form
   33,320.72/45,978.15 = 21,400.19/x
3. Step 3: Cross multiply
   33,320.72x = 45,978.15 × 21,400.19
4. Step 4: Simplify right side
   33,320.72x = 983,941,145.85
5. Step 5: Solve for x
   x = 983,941,145.85/33,320.72
6. Step 6: Final answer
   x = 29,529.41