Finding the Fourth Proportional to 99,069.30, 148,610.79 and 39,905.10

Step by Step Solution

1. Step 1: Write the proportion equation
   99,069.30 : 148,610.79 = 39,905.10 : x
2. Step 2: Convert to fraction form
   99,069.30/148,610.79 = 39,905.10/x
3. Step 3: Cross multiply
   99,069.30x = 148,610.79 × 39,905.10
4. Step 4: Simplify right side
   99,069.30x = 5,930,328,436.03
5. Step 5: Solve for x
   x = 5,930,328,436.03/99,069.30
6. Step 6: Final answer
   x = 59,860.41