Finding the Fourth Proportional to 3,667.61, 5,061.29 and 1,988.91

Step by Step Solution

1. Step 1: Write the proportion equation
   3,667.61 : 5,061.29 = 1,988.91 : x
2. Step 2: Convert to fraction form
   3,667.61/5,061.29 = 1,988.91/x
3. Step 3: Cross multiply
   3,667.61x = 5,061.29 × 1,988.91
4. Step 4: Simplify right side
   3,667.61x = 10,066,440.35
5. Step 5: Solve for x
   x = 10,066,440.35/3,667.61
6. Step 6: Final answer
   x = 2,744.68