Finding the Fourth Proportional to 15,377.32, 21,222.27 and 9,412.93

Step by Step Solution

1. Step 1: Write the proportion equation
   15,377.32 : 21,222.27 = 9,412.93 : x
2. Step 2: Convert to fraction form
   15,377.32/21,222.27 = 9,412.93/x
3. Step 3: Cross multiply
   15,377.32x = 21,222.27 × 9,412.93
4. Step 4: Simplify right side
   15,377.32x = 199,763,588.78
5. Step 5: Solve for x
   x = 199,763,588.78/15,377.32
6. Step 6: Final answer
   x = 12,990.80