Finding the Fourth Proportional to 123,019.21, 169,779.05 and 75,304.09

Step by Step Solution

1. Step 1: Write the proportion equation
   123,019.21 : 169,779.05 = 75,304.09 : x
2. Step 2: Convert to fraction form
   123,019.21/169,779.05 = 75,304.09/x
3. Step 3: Cross multiply
   123,019.21x = 169,779.05 × 75,304.09
4. Step 4: Simplify right side
   123,019.21x = 12,785,056,861.31
5. Step 5: Solve for x
   x = 12,785,056,861.31/123,019.21
6. Step 6: Final answer
   x = 103,927.32