Finding the Fourth Proportional to 118,028.72, 162,897 and 77,736.08

Step by Step Solution

1. Step 1: Write the proportion equation
   118,028.72 : 162,897 = 77,736.08 : x
2. Step 2: Convert to fraction form
   118,028.72/162,897 = 77,736.08/x
3. Step 3: Cross multiply
   118,028.72x = 162,897 × 77,736.08
4. Step 4: Simplify right side
   118,028.72x = 12,662,974,223.76
5. Step 5: Solve for x
   x = 12,662,974,223.76/118,028.72
6. Step 6: Final answer
   x = 107,287.23