Finding the Fourth Proportional to 118,855.98, 164,019.87 and 64,407.06

Step by Step Solution

1. Step 1: Write the proportion equation
   118,855.98 : 164,019.87 = 64,407.06 : x
2. Step 2: Convert to fraction form
   118,855.98/164,019.87 = 64,407.06/x
3. Step 3: Cross multiply
   118,855.98x = 164,019.87 × 64,407.06
4. Step 4: Simplify right side
   118,855.98x = 10,564,037,608.28
5. Step 5: Solve for x
   x = 10,564,037,608.28/118,855.98
6. Step 6: Final answer
   x = 88,880.99