Finding the Fourth Proportional to 118,439.20, 163,448.23 and 64,726.48

Step by Step Solution

1. Step 1: Write the proportion equation
   118,439.20 : 163,448.23 = 64,726.48 : x
2. Step 2: Convert to fraction form
   118,439.20/163,448.23 = 64,726.48/x
3. Step 3: Cross multiply
   118,439.20x = 163,448.23 × 64,726.48
4. Step 4: Simplify right side
   118,439.20x = 10,579,427,772.89
5. Step 5: Solve for x
   x = 10,579,427,772.89/118,439.20
6. Step 6: Final answer
   x = 89,323.71