Finding the Fourth Proportional to 118,434.10, 163,438.73 and 64,719.46

Step by Step Solution

1. Step 1: Write the proportion equation
   118,434.10 : 163,438.73 = 64,719.46 : x
2. Step 2: Convert to fraction form
   118,434.10/163,438.73 = 64,719.46/x
3. Step 3: Cross multiply
   118,434.10x = 163,438.73 × 64,719.46
4. Step 4: Simplify right side
   118,434.10x = 10,577,666,348.69
5. Step 5: Solve for x
   x = 10,577,666,348.69/118,434.10
6. Step 6: Final answer
   x = 89,312.68