Finding the Fourth Proportional to 78,321.33, 117,443.42 and 28,393.94

Step by Step Solution

1. Step 1: Write the proportion equation
   78,321.33 : 117,443.42 = 28,393.94 : x
2. Step 2: Convert to fraction form
   78,321.33/117,443.42 = 28,393.94/x
3. Step 3: Cross multiply
   78,321.33x = 117,443.42 × 28,393.94
4. Step 4: Simplify right side
   78,321.33x = 3,334,681,678.99
5. Step 5: Solve for x
   x = 3,334,681,678.99/78,321.33
6. Step 6: Final answer
   x = 42,576.93