Finding the Fourth Proportional to 10,215.70, 15,307.54 and 7,101.76

Step by Step Solution

1. Step 1: Write the proportion equation
   10,215.70 : 15,307.54 = 7,101.76 : x
2. Step 2: Convert to fraction form
   10,215.70/15,307.54 = 7,101.76/x
3. Step 3: Cross multiply
   10,215.70x = 15,307.54 × 7,101.76
4. Step 4: Simplify right side
   10,215.70x = 108,710,475.27
5. Step 5: Solve for x
   x = 108,710,475.27/10,215.70
6. Step 6: Final answer
   x = 10,641.51