Finding the Fourth Proportional to 118,359.91, 163,341.98 and 64,645.36

Step by Step Solution

1. Step 1: Write the proportion equation
   118,359.91 : 163,341.98 = 64,645.36 : x
2. Step 2: Convert to fraction form
   118,359.91/163,341.98 = 64,645.36/x
3. Step 3: Cross multiply
   118,359.91x = 163,341.98 × 64,645.36
4. Step 4: Simplify right side
   118,359.91x = 10,559,301,100.21
5. Step 5: Solve for x
   x = 10,559,301,100.21/118,359.91
6. Step 6: Final answer
   x = 89,213.49