Finding the Fourth Proportional to 92,005.18, 138,007.59 and 28,830.13

Step by Step Solution

1. Step 1: Write the proportion equation
   92,005.18 : 138,007.59 = 28,830.13 : x
2. Step 2: Convert to fraction form
   92,005.18/138,007.59 = 28,830.13/x
3. Step 3: Cross multiply
   92,005.18x = 138,007.59 × 28,830.13
4. Step 4: Simplify right side
   92,005.18x = 3,978,776,760.69
5. Step 5: Solve for x
   x = 3,978,776,760.69/92,005.18
6. Step 6: Final answer
   x = 43,245.14