Finding the Fourth Proportional to 8,739.59, 12,054.38 and 5,378.00

Step by Step Solution

1. Step 1: Write the proportion equation
   8,739.59 : 12,054.38 = 5,378.00 : x
2. Step 2: Convert to fraction form
   8,739.59/12,054.38 = 5,378.00/x
3. Step 3: Cross multiply
   8,739.59x = 12,054.38 × 5,378.00
4. Step 4: Simplify right side
   8,739.59x = 64,828,368.48
5. Step 5: Solve for x
   x = 64,828,368.48/8,739.59
6. Step 6: Final answer
   x = 7,417.79