Finding the Fourth Proportional to 118,648.29, 177,980.31 and 39,763.20

Step by Step Solution

1. Step 1: Write the proportion equation
   118,648.29 : 177,980.31 = 39,763.20 : x
2. Step 2: Convert to fraction form
   118,648.29/177,980.31 = 39,763.20/x
3. Step 3: Cross multiply
   118,648.29x = 177,980.31 × 39,763.20
4. Step 4: Simplify right side
   118,648.29x = 7,077,066,662.59
5. Step 5: Solve for x
   x = 7,077,066,662.59/118,648.29
6. Step 6: Final answer
   x = 59,647.44