Finding the Fourth Proportional to 118,397.51, 163,399.82 and 64,690.59

Step by Step Solution

1. Step 1: Write the proportion equation
   118,397.51 : 163,399.82 = 64,690.59 : x
2. Step 2: Convert to fraction form
   118,397.51/163,399.82 = 64,690.59/x
3. Step 3: Cross multiply
   118,397.51x = 163,399.82 × 64,690.59
4. Step 4: Simplify right side
   118,397.51x = 10,570,430,761.69
5. Step 5: Solve for x
   x = 10,570,430,761.69/118,397.51
6. Step 6: Final answer
   x = 89,279.16