Finding the Fourth Proportional to 139,298.68, 192,275.94 and 88,997.56

Step by Step Solution

1. Step 1: Write the proportion equation
   139,298.68 : 192,275.94 = 88,997.56 : x
2. Step 2: Convert to fraction form
   139,298.68/192,275.94 = 88,997.56/x
3. Step 3: Cross multiply
   139,298.68x = 192,275.94 × 88,997.56
4. Step 4: Simplify right side
   139,298.68x = 17,112,089,506.71
5. Step 5: Solve for x
   x = 17,112,089,506.71/139,298.68
6. Step 6: Final answer
   x = 122,844.59