Finding the Fourth Proportional to 11,699.61, 17,533.89 and 5,118.63

Step by Step Solution

1. Step 1: Write the proportion equation
   11,699.61 : 17,533.89 = 5,118.63 : x
2. Step 2: Convert to fraction form
   11,699.61/17,533.89 = 5,118.63/x
3. Step 3: Cross multiply
   11,699.61x = 17,533.89 × 5,118.63
4. Step 4: Simplify right side
   11,699.61x = 89,749,495.37
5. Step 5: Solve for x
   x = 89,749,495.37/11,699.61
6. Step 6: Final answer
   x = 7,671.15