Finding the Fourth Proportional to 1,666.53, 2,300.69 and 1,077.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,666.53 : 2,300.69 = 1,077.40 : x
2. Step 2: Convert to fraction form
   1,666.53/2,300.69 = 1,077.40/x
3. Step 3: Cross multiply
   1,666.53x = 2,300.69 × 1,077.40
4. Step 4: Simplify right side
   1,666.53x = 2,478,768.98
5. Step 5: Solve for x
   x = 2,478,768.98/1,666.53
6. Step 6: Final answer
   x = 1,487.38