Finding the Fourth Proportional to 11,870.72, 17,808.24 and 4,077.80

Step by Step Solution

1. Step 1: Write the proportion equation
   11,870.72 : 17,808.24 = 4,077.80 : x
2. Step 2: Convert to fraction form
   11,870.72/17,808.24 = 4,077.80/x
3. Step 3: Cross multiply
   11,870.72x = 17,808.24 × 4,077.80
4. Step 4: Simplify right side
   11,870.72x = 72,618,441.07
5. Step 5: Solve for x
   x = 72,618,441.07/11,870.72
6. Step 6: Final answer
   x = 6,117.44