Finding the Fourth Proportional to 83,412.64, 115,161.72 and 64,256.34

Step by Step Solution

1. Step 1: Write the proportion equation
   83,412.64 : 115,161.72 = 64,256.34 : x
2. Step 2: Convert to fraction form
   83,412.64/115,161.72 = 64,256.34/x
3. Step 3: Cross multiply
   83,412.64x = 115,161.72 × 64,256.34
4. Step 4: Simplify right side
   83,412.64x = 7,399,870,720.58
5. Step 5: Solve for x
   x = 7,399,870,720.58/83,412.64
6. Step 6: Final answer
   x = 88,714.03