Finding the Fourth Proportional to 9,861.59, 14,787.28 and 3,620.00

Step by Step Solution

1. Step 1: Write the proportion equation
   9,861.59 : 14,787.28 = 3,620.00 : x
2. Step 2: Convert to fraction form
   9,861.59/14,787.28 = 3,620.00/x
3. Step 3: Cross multiply
   9,861.59x = 14,787.28 × 3,620.00
4. Step 4: Simplify right side
   9,861.59x = 53,529,861.56
5. Step 5: Solve for x
   x = 53,529,861.56/9,861.59
6. Step 6: Final answer
   x = 5,428.12