Finding the Fourth Proportional to 9,953.91, 13,736.76 and 5,478.00

Step by Step Solution

1. Step 1: Write the proportion equation
   9,953.91 : 13,736.76 = 5,478.00 : x
2. Step 2: Convert to fraction form
   9,953.91/13,736.76 = 5,478.00/x
3. Step 3: Cross multiply
   9,953.91x = 13,736.76 × 5,478.00
4. Step 4: Simplify right side
   9,953.91x = 75,250,061.35
5. Step 5: Solve for x
   x = 75,250,061.35/9,953.91
6. Step 6: Final answer
   x = 7,559.85