Finding the Fourth Proportional to 30,499.36, 45,748.72 and 8,312.32

Step by Step Solution

1. Step 1: Write the proportion equation
   30,499.36 : 45,748.72 = 8,312.32 : x
2. Step 2: Convert to fraction form
   30,499.36/45,748.72 = 8,312.32/x
3. Step 3: Cross multiply
   30,499.36x = 45,748.72 × 8,312.32
4. Step 4: Simplify right side
   30,499.36x = 380,278,000.23
5. Step 5: Solve for x
   x = 380,278,000.23/30,499.36
6. Step 6: Final answer
   x = 12,468.39