Finding the Fourth Proportional to 11,663.72, 17,502.84 and 5,090

Step by Step Solution

1. Step 1: Write the proportion equation
   11,663.72 : 17,502.84 = 5,090 : x
2. Step 2: Convert to fraction form
   11,663.72/17,502.84 = 5,090/x
3. Step 3: Cross multiply
   11,663.72x = 17,502.84 × 5,090
4. Step 4: Simplify right side
   11,663.72x = 89,089,455.60
5. Step 5: Solve for x
   x = 89,089,455.60/11,663.72
6. Step 6: Final answer
   x = 7,638.17