Finding the Fourth Proportional to 12,931.32, 19,405.49 and 7,092.03

Step by Step Solution

1. Step 1: Write the proportion equation
   12,931.32 : 19,405.49 = 7,092.03 : x
2. Step 2: Convert to fraction form
   12,931.32/19,405.49 = 7,092.03/x
3. Step 3: Cross multiply
   12,931.32x = 19,405.49 × 7,092.03
4. Step 4: Simplify right side
   12,931.32x = 137,624,365.76
5. Step 5: Solve for x
   x = 137,624,365.76/12,931.32
6. Step 6: Final answer
   x = 10,642.71