Finding the Fourth Proportional to 13,315.83, 19,977.72 and 3,956.16

Step by Step Solution

1. Step 1: Write the proportion equation
   13,315.83 : 19,977.72 = 3,956.16 : x
2. Step 2: Convert to fraction form
   13,315.83/19,977.72 = 3,956.16/x
3. Step 3: Cross multiply
   13,315.83x = 19,977.72 × 3,956.16
4. Step 4: Simplify right side
   13,315.83x = 79,035,056.76
5. Step 5: Solve for x
   x = 79,035,056.76/13,315.83
6. Step 6: Final answer
   x = 5,935.42