Finding the Fourth Proportional to 10,012.35, 15,015.29 and 7,245.39

Step by Step Solution

1. Step 1: Write the proportion equation
   10,012.35 : 15,015.29 = 7,245.39 : x
2. Step 2: Convert to fraction form
   10,012.35/15,015.29 = 7,245.39/x
3. Step 3: Cross multiply
   10,012.35x = 15,015.29 × 7,245.39
4. Step 4: Simplify right side
   10,012.35x = 108,791,595.79
5. Step 5: Solve for x
   x = 108,791,595.79/10,012.35
6. Step 6: Final answer
   x = 10,865.74