Finding the Fourth Proportional to 9,211.52, 13,815.34 and 2,972.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,211.52 : 13,815.34 = 2,972.12 : x
2. Step 2: Convert to fraction form
   9,211.52/13,815.34 = 2,972.12/x
3. Step 3: Cross multiply
   9,211.52x = 13,815.34 × 2,972.12
4. Step 4: Simplify right side
   9,211.52x = 41,060,848.32
5. Step 5: Solve for x
   x = 41,060,848.32/9,211.52
6. Step 6: Final answer
   x = 4,457.55