Finding the Fourth Proportional to 117,020.71, 161,488.10 and 63,305.60

Step by Step Solution

1. Step 1: Write the proportion equation
   117,020.71 : 161,488.10 = 63,305.60 : x
2. Step 2: Convert to fraction form
   117,020.71/161,488.10 = 63,305.60/x
3. Step 3: Cross multiply
   117,020.71x = 161,488.10 × 63,305.60
4. Step 4: Simplify right side
   117,020.71x = 10,223,100,746.83
5. Step 5: Solve for x
   x = 10,223,100,746.83/117,020.71
6. Step 6: Final answer
   x = 87,361.47