Finding the Fourth Proportional to 148,621.93, 205,097.98 and 80,638.89

Step by Step Solution

1. Step 1: Write the proportion equation
   148,621.93 : 205,097.98 = 80,638.89 : x
2. Step 2: Convert to fraction form
   148,621.93/205,097.98 = 80,638.89/x
3. Step 3: Cross multiply
   148,621.93x = 205,097.98 × 80,638.89
4. Step 4: Simplify right side
   148,621.93x = 16,538,872,880.45
5. Step 5: Solve for x
   x = 16,538,872,880.45/148,621.93
6. Step 6: Final answer
   x = 111,281.51