Finding the Fourth Proportional to 17,667.79, 26,502.12 and 5,186.50

Step by Step Solution

1. Step 1: Write the proportion equation
   17,667.79 : 26,502.12 = 5,186.50 : x
2. Step 2: Convert to fraction form
   17,667.79/26,502.12 = 5,186.50/x
3. Step 3: Cross multiply
   17,667.79x = 26,502.12 × 5,186.50
4. Step 4: Simplify right side
   17,667.79x = 137,453,179.12
5. Step 5: Solve for x
   x = 137,453,179.12/17,667.79
6. Step 6: Final answer
   x = 7,779.88