Finding the Fourth Proportional to 99,378, 137,144.52 and 54,666

Step by Step Solution

1. Step 1: Write the proportion equation
   99,378 : 137,144.52 = 54,666 : x
2. Step 2: Convert to fraction form
   99,378/137,144.52 = 54,666/x
3. Step 3: Cross multiply
   99,378x = 137,144.52 × 54,666
4. Step 4: Simplify right side
   99,378x = 7,497,142,330.32
5. Step 5: Solve for x
   x = 7,497,142,330.32/99,378
6. Step 6: Final answer
   x = 75,440.66