Finding the Fourth Proportional to 13,501.60, 18,624.72 and 7,911.52

Step by Step Solution

1. Step 1: Write the proportion equation
   13,501.60 : 18,624.72 = 7,911.52 : x
2. Step 2: Convert to fraction form
   13,501.60/18,624.72 = 7,911.52/x
3. Step 3: Cross multiply
   13,501.60x = 18,624.72 × 7,911.52
4. Step 4: Simplify right side
   13,501.60x = 147,349,844.77
5. Step 5: Solve for x
   x = 147,349,844.77/13,501.60
6. Step 6: Final answer
   x = 10,913.51