Finding the Fourth Proportional to 13,953.61, 19,255.95 and 7,665.99

Step by Step Solution

1. Step 1: Write the proportion equation
   13,953.61 : 19,255.95 = 7,665.99 : x
2. Step 2: Convert to fraction form
   13,953.61/19,255.95 = 7,665.99/x
3. Step 3: Cross multiply
   13,953.61x = 19,255.95 × 7,665.99
4. Step 4: Simplify right side
   13,953.61x = 147,615,823.86
5. Step 5: Solve for x
   x = 147,615,823.86/13,953.61
6. Step 6: Final answer
   x = 10,579.05