Finding the Fourth Proportional to 78,172, 107,881.20 and 42,844

Step by Step Solution

1. Step 1: Write the proportion equation
   78,172 : 107,881.20 = 42,844 : x
2. Step 2: Convert to fraction form
   78,172/107,881.20 = 42,844/x
3. Step 3: Cross multiply
   78,172x = 107,881.20 × 42,844
4. Step 4: Simplify right side
   78,172x = 4,622,062,132.80
5. Step 5: Solve for x
   x = 4,622,062,132.80/78,172
6. Step 6: Final answer
   x = 59,126.82