Finding the Fourth Proportional to 28,630.86, 42,916.96 and 12,000.52

Step by Step Solution

1. Step 1: Write the proportion equation
   28,630.86 : 42,916.96 = 12,000.52 : x
2. Step 2: Convert to fraction form
   28,630.86/42,916.96 = 12,000.52/x
3. Step 3: Cross multiply
   28,630.86x = 42,916.96 × 12,000.52
4. Step 4: Simplify right side
   28,630.86x = 515,025,836.82
5. Step 5: Solve for x
   x = 515,025,836.82/28,630.86
6. Step 6: Final answer
   x = 17,988.49