Finding the Fourth Proportional to 78,443.15, 117,652.33 and 65,201.20

Step by Step Solution

1. Step 1: Write the proportion equation
   78,443.15 : 117,652.33 = 65,201.20 : x
2. Step 2: Convert to fraction form
   78,443.15/117,652.33 = 65,201.20/x
3. Step 3: Cross multiply
   78,443.15x = 117,652.33 × 65,201.20
4. Step 4: Simplify right side
   78,443.15x = 7,671,072,184.53
5. Step 5: Solve for x
   x = 7,671,072,184.53/78,443.15
6. Step 6: Final answer
   x = 97,791.49