Finding the Fourth Proportional to 98,871.33, 136,450.83 and 55,858.72

Step by Step Solution

1. Step 1: Write the proportion equation
   98,871.33 : 136,450.83 = 55,858.72 : x
2. Step 2: Convert to fraction form
   98,871.33/136,450.83 = 55,858.72/x
3. Step 3: Cross multiply
   98,871.33x = 136,450.83 × 55,858.72
4. Step 4: Simplify right side
   98,871.33x = 7,621,968,706.74
5. Step 5: Solve for x
   x = 7,621,968,706.74/98,871.33
6. Step 6: Final answer
   x = 77,089.78