Finding the Fourth Proportional to 139,531.60, 192,551.32 and 75,871

Step by Step Solution

1. Step 1: Write the proportion equation
   139,531.60 : 192,551.32 = 75,871 : x
2. Step 2: Convert to fraction form
   139,531.60/192,551.32 = 75,871/x
3. Step 3: Cross multiply
   139,531.60x = 192,551.32 × 75,871
4. Step 4: Simplify right side
   139,531.60x = 14,609,061,199.72
5. Step 5: Solve for x
   x = 14,609,061,199.72/139,531.60
6. Step 6: Final answer
   x = 104,700.74