Finding the Fourth Proportional to 51,980, 78,004.56 and 19,148

Step by Step Solution

1. Step 1: Write the proportion equation
   51,980 : 78,004.56 = 19,148 : x
2. Step 2: Convert to fraction form
   51,980/78,004.56 = 19,148/x
3. Step 3: Cross multiply
   51,980x = 78,004.56 × 19,148
4. Step 4: Simplify right side
   51,980x = 1,493,631,314.88
5. Step 5: Solve for x
   x = 1,493,631,314.88/51,980
6. Step 6: Final answer
   x = 28,734.73