Finding the Fourth Proportional to 102,719.32, 153,815.93 and 71,085.58

Step by Step Solution

1. Step 1: Write the proportion equation
   102,719.32 : 153,815.93 = 71,085.58 : x
2. Step 2: Convert to fraction form
   102,719.32/153,815.93 = 71,085.58/x
3. Step 3: Cross multiply
   102,719.32x = 153,815.93 × 71,085.58
4. Step 4: Simplify right side
   102,719.32x = 10,934,093,472.78
5. Step 5: Solve for x
   x = 10,934,093,472.78/102,719.32
6. Step 6: Final answer
   x = 106,446.32