Finding the Fourth Proportional to 2,100.08, 2,897.88 and 1,215.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.08 : 2,897.88 = 1,215.74 : x
2. Step 2: Convert to fraction form
   2,100.08/2,897.88 = 1,215.74/x
3. Step 3: Cross multiply
   2,100.08x = 2,897.88 × 1,215.74
4. Step 4: Simplify right side
   2,100.08x = 3,523,068.63
5. Step 5: Solve for x
   x = 3,523,068.63/2,100.08
6. Step 6: Final answer
   x = 1,677.59