Finding the Fourth Proportional to 139,690.72, 192,773.20 and 76,028.98

Step by Step Solution

1. Step 1: Write the proportion equation
   139,690.72 : 192,773.20 = 76,028.98 : x
2. Step 2: Convert to fraction form
   139,690.72/192,773.20 = 76,028.98/x
3. Step 3: Cross multiply
   139,690.72x = 192,773.20 × 76,028.98
4. Step 4: Simplify right side
   139,690.72x = 14,656,349,767.34
5. Step 5: Solve for x
   x = 14,656,349,767.34/139,690.72
6. Step 6: Final answer
   x = 104,920.00