Finding the Fourth Proportional to 108,761.83, 163,136.21 and 64,669.19

Step by Step Solution

1. Step 1: Write the proportion equation
   108,761.83 : 163,136.21 = 64,669.19 : x
2. Step 2: Convert to fraction form
   108,761.83/163,136.21 = 64,669.19/x
3. Step 3: Cross multiply
   108,761.83x = 163,136.21 × 64,669.19
4. Step 4: Simplify right side
   108,761.83x = 10,549,885,421.34
5. Step 5: Solve for x
   x = 10,549,885,421.34/108,761.83
6. Step 6: Final answer
   x = 96,999.89