Finding the Fourth Proportional to 11,123.06, 16,690.05 and 5,200.35

Step by Step Solution

1. Step 1: Write the proportion equation
   11,123.06 : 16,690.05 = 5,200.35 : x
2. Step 2: Convert to fraction form
   11,123.06/16,690.05 = 5,200.35/x
3. Step 3: Cross multiply
   11,123.06x = 16,690.05 × 5,200.35
4. Step 4: Simplify right side
   11,123.06x = 86,794,038.93
5. Step 5: Solve for x
   x = 86,794,038.93/11,123.06
6. Step 6: Final answer
   x = 7,803.08