Finding the Fourth Proportional to 118,536.58, 163,573.86 and 64,810.90

Step by Step Solution

1. Step 1: Write the proportion equation
   118,536.58 : 163,573.86 = 64,810.90 : x
2. Step 2: Convert to fraction form
   118,536.58/163,573.86 = 64,810.90/x
3. Step 3: Cross multiply
   118,536.58x = 163,573.86 × 64,810.90
4. Step 4: Simplify right side
   118,536.58x = 10,601,369,083.07
5. Step 5: Solve for x
   x = 10,601,369,083.07/118,536.58
6. Step 6: Final answer
   x = 89,435.42