Finding the Fourth Proportional to 78,233.04, 107,933.30 and 51,390

Step by Step Solution

1. Step 1: Write the proportion equation
   78,233.04 : 107,933.30 = 51,390 : x
2. Step 2: Convert to fraction form
   78,233.04/107,933.30 = 51,390/x
3. Step 3: Cross multiply
   78,233.04x = 107,933.30 × 51,390
4. Step 4: Simplify right side
   78,233.04x = 5,546,692,287
5. Step 5: Solve for x
   x = 5,546,692,287/78,233.04
6. Step 6: Final answer
   x = 70,899.61