Finding the Fourth Proportional to 123,090.76, 169,780.80 and 75,367.72

Step by Step Solution

1. Step 1: Write the proportion equation
   123,090.76 : 169,780.80 = 75,367.72 : x
2. Step 2: Convert to fraction form
   123,090.76/169,780.80 = 75,367.72/x
3. Step 3: Cross multiply
   123,090.76x = 169,780.80 × 75,367.72
4. Step 4: Simplify right side
   123,090.76x = 12,795,991,795.78
5. Step 5: Solve for x
   x = 12,795,991,795.78/123,090.76
6. Step 6: Final answer
   x = 103,955.75