Finding the Fourth Proportional to 139,758.32, 192,870.60 and 76,098.80

Step by Step Solution

1. Step 1: Write the proportion equation
   139,758.32 : 192,870.60 = 76,098.80 : x
2. Step 2: Convert to fraction form
   139,758.32/192,870.60 = 76,098.80/x
3. Step 3: Cross multiply
   139,758.32x = 192,870.60 × 76,098.80
4. Step 4: Simplify right side
   139,758.32x = 14,677,221,215.28
5. Step 5: Solve for x
   x = 14,677,221,215.28/139,758.32
6. Step 6: Final answer
   x = 105,018.59