Finding the Fourth Proportional to 118,996.12, 178,436.72 and 69,088.80

Step by Step Solution

1. Step 1: Write the proportion equation
   118,996.12 : 178,436.72 = 69,088.80 : x
2. Step 2: Convert to fraction form
   118,996.12/178,436.72 = 69,088.80/x
3. Step 3: Cross multiply
   118,996.12x = 178,436.72 × 69,088.80
4. Step 4: Simplify right side
   118,996.12x = 12,327,978,860.74
5. Step 5: Solve for x
   x = 12,327,978,860.74/118,996.12
6. Step 6: Final answer
   x = 103,599.84