Finding the Fourth Proportional to 116,172.12, 160,310.88 and 64,486.56

Step by Step Solution

1. Step 1: Write the proportion equation
   116,172.12 : 160,310.88 = 64,486.56 : x
2. Step 2: Convert to fraction form
   116,172.12/160,310.88 = 64,486.56/x
3. Step 3: Cross multiply
   116,172.12x = 160,310.88 × 64,486.56
4. Step 4: Simplify right side
   116,172.12x = 10,337,897,181.77
5. Step 5: Solve for x
   x = 10,337,897,181.77/116,172.12
6. Step 6: Final answer
   x = 88,987.76