Finding the Fourth Proportional to 99,848.96, 137,790.72 and 55,136

Step by Step Solution

1. Step 1: Write the proportion equation
   99,848.96 : 137,790.72 = 55,136 : x
2. Step 2: Convert to fraction form
   99,848.96/137,790.72 = 55,136/x
3. Step 3: Cross multiply
   99,848.96x = 137,790.72 × 55,136
4. Step 4: Simplify right side
   99,848.96x = 7,597,229,137.92
5. Step 5: Solve for x
   x = 7,597,229,137.92/99,848.96
6. Step 6: Final answer
   x = 76,087.21