Finding the Fourth Proportional to 3,672.72, 5,070.09 and 2,100.51

Step by Step Solution

1. Step 1: Write the proportion equation
   3,672.72 : 5,070.09 = 2,100.51 : x
2. Step 2: Convert to fraction form
   3,672.72/5,070.09 = 2,100.51/x
3. Step 3: Cross multiply
   3,672.72x = 5,070.09 × 2,100.51
4. Step 4: Simplify right side
   3,672.72x = 10,649,774.75
5. Step 5: Solve for x
   x = 10,649,774.75/3,672.72
6. Step 6: Final answer
   x = 2,899.70