Finding the Fourth Proportional to 12,099, 18,155.40 and 4,702.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,099 : 18,155.40 = 4,702.50 : x
2. Step 2: Convert to fraction form
   12,099/18,155.40 = 4,702.50/x
3. Step 3: Cross multiply
   12,099x = 18,155.40 × 4,702.50
4. Step 4: Simplify right side
   12,099x = 85,375,677.72
5. Step 5: Solve for x
   x = 85,375,677.72/12,099
6. Step 6: Final answer
   x = 7,056.42