Finding the Fourth Proportional to 10,212.51, 15,321.54 and 3,972.77

Step by Step Solution

1. Step 1: Write the proportion equation
   10,212.51 : 15,321.54 = 3,972.77 : x
2. Step 2: Convert to fraction form
   10,212.51/15,321.54 = 3,972.77/x
3. Step 3: Cross multiply
   10,212.51x = 15,321.54 × 3,972.77
4. Step 4: Simplify right side
   10,212.51x = 60,868,877.86
5. Step 5: Solve for x
   x = 60,868,877.86/10,212.51
6. Step 6: Final answer
   x = 5,960.23