Finding the Fourth Proportional to 12,972.65, 17,902.28 and 7,522.77

Step by Step Solution

1. Step 1: Write the proportion equation
   12,972.65 : 17,902.28 = 7,522.77 : x
2. Step 2: Convert to fraction form
   12,972.65/17,902.28 = 7,522.77/x
3. Step 3: Cross multiply
   12,972.65x = 17,902.28 × 7,522.77
4. Step 4: Simplify right side
   12,972.65x = 134,674,753.72
5. Step 5: Solve for x
   x = 134,674,753.72/12,972.65
6. Step 6: Final answer
   x = 10,381.44