Finding the Fourth Proportional to 12,970.32, 19,473.50 and 9,012.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,970.32 : 19,473.50 = 9,012.25 : x
2. Step 2: Convert to fraction form
   12,970.32/19,473.50 = 9,012.25/x
3. Step 3: Cross multiply
   12,970.32x = 19,473.50 × 9,012.25
4. Step 4: Simplify right side
   12,970.32x = 175,500,050.38
5. Step 5: Solve for x
   x = 175,500,050.38/12,970.32
6. Step 6: Final answer
   x = 13,530.90