Finding the Fourth Proportional to 28,443.84, 42,670.74 and 9,719.48

Step by Step Solution

1. Step 1: Write the proportion equation
   28,443.84 : 42,670.74 = 9,719.48 : x
2. Step 2: Convert to fraction form
   28,443.84/42,670.74 = 9,719.48/x
3. Step 3: Cross multiply
   28,443.84x = 42,670.74 × 9,719.48
4. Step 4: Simplify right side
   28,443.84x = 414,737,404.02
5. Step 5: Solve for x
   x = 414,737,404.02/28,443.84
6. Step 6: Final answer
   x = 14,580.92