Finding the Fourth Proportional to 139,308.32, 192,240.16 and 75,644.72

Step by Step Solution

1. Step 1: Write the proportion equation
   139,308.32 : 192,240.16 = 75,644.72 : x
2. Step 2: Convert to fraction form
   139,308.32/192,240.16 = 75,644.72/x
3. Step 3: Cross multiply
   139,308.32x = 192,240.16 × 75,644.72
4. Step 4: Simplify right side
   139,308.32x = 14,541,953,075.96
5. Step 5: Solve for x
   x = 14,541,953,075.96/139,308.32
6. Step 6: Final answer
   x = 104,386.82