Finding the Fourth Proportional to 1,535.34, 2,116.88 and 1,298.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,535.34 : 2,116.88 = 1,298.88 : x
2. Step 2: Convert to fraction form
   1,535.34/2,116.88 = 1,298.88/x
3. Step 3: Cross multiply
   1,535.34x = 2,116.88 × 1,298.88
4. Step 4: Simplify right side
   1,535.34x = 2,749,566.60
5. Step 5: Solve for x
   x = 2,749,566.60/1,535.34
6. Step 6: Final answer
   x = 1,790.85