Finding the Fourth Proportional to 69,990.98, 104,898.98 and 55,141.25

Step by Step Solution

1. Step 1: Write the proportion equation
   69,990.98 : 104,898.98 = 55,141.25 : x
2. Step 2: Convert to fraction form
   69,990.98/104,898.98 = 55,141.25/x
3. Step 3: Cross multiply
   69,990.98x = 104,898.98 × 55,141.25
4. Step 4: Simplify right side
   69,990.98x = 5,784,260,494.28
5. Step 5: Solve for x
   x = 5,784,260,494.28/69,990.98
6. Step 6: Final answer
   x = 82,642.95