Finding the Fourth Proportional to 99,144.76, 148,723.94 and 39,980.92

Step by Step Solution

1. Step 1: Write the proportion equation
   99,144.76 : 148,723.94 = 39,980.92 : x
2. Step 2: Convert to fraction form
   99,144.76/148,723.94 = 39,980.92/x
3. Step 3: Cross multiply
   99,144.76x = 148,723.94 × 39,980.92
4. Step 4: Simplify right side
   99,144.76x = 5,946,119,947.22
5. Step 5: Solve for x
   x = 5,946,119,947.22/99,144.76
6. Step 6: Final answer
   x = 59,974.12