Finding the Fourth Proportional to 139,300.68, 192,278.70 and 88,999.56

Step by Step Solution

1. Step 1: Write the proportion equation
   139,300.68 : 192,278.70 = 88,999.56 : x
2. Step 2: Convert to fraction form
   139,300.68/192,278.70 = 88,999.56/x
3. Step 3: Cross multiply
   139,300.68x = 192,278.70 × 88,999.56
4. Step 4: Simplify right side
   139,300.68x = 17,112,719,697.37
5. Step 5: Solve for x
   x = 17,112,719,697.37/139,300.68
6. Step 6: Final answer
   x = 122,847.35