Finding the Fourth Proportional to 155,041.48, 213,958.56 and 90,555.76

Step by Step Solution

1. Step 1: Write the proportion equation
   155,041.48 : 213,958.56 = 90,555.76 : x
2. Step 2: Convert to fraction form
   155,041.48/213,958.56 = 90,555.76/x
3. Step 3: Cross multiply
   155,041.48x = 213,958.56 × 90,555.76
4. Step 4: Simplify right side
   155,041.48x = 19,375,180,009.31
5. Step 5: Solve for x
   x = 19,375,180,009.31/155,041.48
6. Step 6: Final answer
   x = 124,967.72