Finding the Fourth Proportional to 1,748.82, 2,602.59 and 1,690.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,748.82 : 2,602.59 = 1,690.50 : x
2. Step 2: Convert to fraction form
   1,748.82/2,602.59 = 1,690.50/x
3. Step 3: Cross multiply
   1,748.82x = 2,602.59 × 1,690.50
4. Step 4: Simplify right side
   1,748.82x = 4,399,678.40
5. Step 5: Solve for x
   x = 4,399,678.40/1,748.82
6. Step 6: Final answer
   x = 2,515.80