Finding the Fourth Proportional to 83,356.62, 115,085.79 and 74,388.72

Step by Step Solution

1. Step 1: Write the proportion equation
   83,356.62 : 115,085.79 = 74,388.72 : x
2. Step 2: Convert to fraction form
   83,356.62/115,085.79 = 74,388.72/x
3. Step 3: Cross multiply
   83,356.62x = 115,085.79 × 74,388.72
4. Step 4: Simplify right side
   83,356.62x = 8,561,084,608.29
5. Step 5: Solve for x
   x = 8,561,084,608.29/83,356.62
6. Step 6: Final answer
   x = 102,704.32