Finding the Fourth Proportional to 154,439.48, 231,635.43 and 42,128.84

Step by Step Solution

1. Step 1: Write the proportion equation
   154,439.48 : 231,635.43 = 42,128.84 : x
2. Step 2: Convert to fraction form
   154,439.48/231,635.43 = 42,128.84/x
3. Step 3: Cross multiply
   154,439.48x = 231,635.43 × 42,128.84
4. Step 4: Simplify right side
   154,439.48x = 9,758,532,547.89
5. Step 5: Solve for x
   x = 9,758,532,547.89/154,439.48
6. Step 6: Final answer
   x = 63,186.77