Finding the Fourth Proportional to 1,666.63, 2,499.43 and 692.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,666.63 : 2,499.43 = 692.50 : x
2. Step 2: Convert to fraction form
   1,666.63/2,499.43 = 692.50/x
3. Step 3: Cross multiply
   1,666.63x = 2,499.43 × 692.50
4. Step 4: Simplify right side
   1,666.63x = 1,730,855.28
5. Step 5: Solve for x
   x = 1,730,855.28/1,666.63
6. Step 6: Final answer
   x = 1,038.54