Finding the Fourth Proportional to 78,172.32, 107,887.36 and 50,977.49

Step by Step Solution

1. Step 1: Write the proportion equation
   78,172.32 : 107,887.36 = 50,977.49 : x
2. Step 2: Convert to fraction form
   78,172.32/107,887.36 = 50,977.49/x
3. Step 3: Cross multiply
   78,172.32x = 107,887.36 × 50,977.49
4. Step 4: Simplify right side
   78,172.32x = 5,499,826,484.32
5. Step 5: Solve for x
   x = 5,499,826,484.32/78,172.32
6. Step 6: Final answer
   x = 70,355.17