Finding the Fourth Proportional to 28,123.95, 42,192.76 and 8,402.37

Step by Step Solution

1. Step 1: Write the proportion equation
   28,123.95 : 42,192.76 = 8,402.37 : x
2. Step 2: Convert to fraction form
   28,123.95/42,192.76 = 8,402.37/x
3. Step 3: Cross multiply
   28,123.95x = 42,192.76 × 8,402.37
4. Step 4: Simplify right side
   28,123.95x = 354,519,180.84
5. Step 5: Solve for x
   x = 354,519,180.84/28,123.95
6. Step 6: Final answer
   x = 12,605.60