Finding the Fourth Proportional to 12,670.32, 17,475.72 and 9,312

Step by Step Solution

1. Step 1: Write the proportion equation
   12,670.32 : 17,475.72 = 9,312 : x
2. Step 2: Convert to fraction form
   12,670.32/17,475.72 = 9,312/x
3. Step 3: Cross multiply
   12,670.32x = 17,475.72 × 9,312
4. Step 4: Simplify right side
   12,670.32x = 162,733,904.64
5. Step 5: Solve for x
   x = 162,733,904.64/12,670.32
6. Step 6: Final answer
   x = 12,843.71