Finding the Fourth Proportional to 28,124, 42,188.43 and 7,347.50

Step by Step Solution

1. Step 1: Write the proportion equation
   28,124 : 42,188.43 = 7,347.50 : x
2. Step 2: Convert to fraction form
   28,124/42,188.43 = 7,347.50/x
3. Step 3: Cross multiply
   28,124x = 42,188.43 × 7,347.50
4. Step 4: Simplify right side
   28,124x = 309,979,489.43
5. Step 5: Solve for x
   x = 309,979,489.43/28,124
6. Step 6: Final answer
   x = 11,021.88