Finding the Fourth Proportional to 96,196.88, 143,522.74 and 86,243.60

Step by Step Solution

1. Step 1: Write the proportion equation
   96,196.88 : 143,522.74 = 86,243.60 : x
2. Step 2: Convert to fraction form
   96,196.88/143,522.74 = 86,243.60/x
3. Step 3: Cross multiply
   96,196.88x = 143,522.74 × 86,243.60
4. Step 4: Simplify right side
   96,196.88x = 12,377,917,779.46
5. Step 5: Solve for x
   x = 12,377,917,779.46/96,196.88
6. Step 6: Final answer
   x = 128,672.76