Finding the Fourth Proportional to 8,973.72, 12,384.90 and 5,436.99

Step by Step Solution

1. Step 1: Write the proportion equation
   8,973.72 : 12,384.90 = 5,436.99 : x
2. Step 2: Convert to fraction form
   8,973.72/12,384.90 = 5,436.99/x
3. Step 3: Cross multiply
   8,973.72x = 12,384.90 × 5,436.99
4. Step 4: Simplify right side
   8,973.72x = 67,336,577.45
5. Step 5: Solve for x
   x = 67,336,577.45/8,973.72
6. Step 6: Final answer
   x = 7,503.75