Finding the Fourth Proportional to 73,788.96, 110,667.12 and 21,186.72

Step by Step Solution

1. Step 1: Write the proportion equation
   73,788.96 : 110,667.12 = 21,186.72 : x
2. Step 2: Convert to fraction form
   73,788.96/110,667.12 = 21,186.72/x
3. Step 3: Cross multiply
   73,788.96x = 110,667.12 × 21,186.72
4. Step 4: Simplify right side
   73,788.96x = 2,344,673,284.65
5. Step 5: Solve for x
   x = 2,344,673,284.65/73,788.96
6. Step 6: Final answer
   x = 31,775.39