Finding the Fourth Proportional to 13,776.66, 19,011.72 and 7,489.02

Step by Step Solution

1. Step 1: Write the proportion equation
   13,776.66 : 19,011.72 = 7,489.02 : x
2. Step 2: Convert to fraction form
   13,776.66/19,011.72 = 7,489.02/x
3. Step 3: Cross multiply
   13,776.66x = 19,011.72 × 7,489.02
4. Step 4: Simplify right side
   13,776.66x = 142,379,151.31
5. Step 5: Solve for x
   x = 142,379,151.31/13,776.66
6. Step 6: Final answer
   x = 10,334.81