Finding the Fourth Proportional to 3,060.88, 4,588.72 and 1,213.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,060.88 : 4,588.72 = 1,213.30 : x
2. Step 2: Convert to fraction form
   3,060.88/4,588.72 = 1,213.30/x
3. Step 3: Cross multiply
   3,060.88x = 4,588.72 × 1,213.30
4. Step 4: Simplify right side
   3,060.88x = 5,567,493.98
5. Step 5: Solve for x
   x = 5,567,493.98/3,060.88
6. Step 6: Final answer
   x = 1,818.92