Finding the Fourth Proportional to 30,667.92, 42,307.52 and 17,921.63

Step by Step Solution

1. Step 1: Write the proportion equation
   30,667.92 : 42,307.52 = 17,921.63 : x
2. Step 2: Convert to fraction form
   30,667.92/42,307.52 = 17,921.63/x
3. Step 3: Cross multiply
   30,667.92x = 42,307.52 × 17,921.63
4. Step 4: Simplify right side
   30,667.92x = 758,219,418.51
5. Step 5: Solve for x
   x = 758,219,418.51/30,667.92
6. Step 6: Final answer
   x = 24,723.54