Finding the Fourth Proportional to 99,786, 137,704.86 and 55,074

Step by Step Solution

1. Step 1: Write the proportion equation
   99,786 : 137,704.86 = 55,074 : x
2. Step 2: Convert to fraction form
   99,786/137,704.86 = 55,074/x
3. Step 3: Cross multiply
   99,786x = 137,704.86 × 55,074
4. Step 4: Simplify right side
   99,786x = 7,583,957,459.64
5. Step 5: Solve for x
   x = 7,583,957,459.64/99,786
6. Step 6: Final answer
   x = 76,002.22