Finding the Fourth Proportional to 123,113.76, 169,884.72 and 75,380.64

Step by Step Solution

1. Step 1: Write the proportion equation
   123,113.76 : 169,884.72 = 75,380.64 : x
2. Step 2: Convert to fraction form
   123,113.76/169,884.72 = 75,380.64/x
3. Step 3: Cross multiply
   123,113.76x = 169,884.72 × 75,380.64
4. Step 4: Simplify right side
   123,113.76x = 12,806,018,919.82
5. Step 5: Solve for x
   x = 12,806,018,919.82/123,113.76
6. Step 6: Final answer
   x = 104,017.77