Finding the Fourth Proportional to 139,913.21, 193,111.39 and 88,916.00

Step by Step Solution

1. Step 1: Write the proportion equation
   139,913.21 : 193,111.39 = 88,916.00 : x
2. Step 2: Convert to fraction form
   139,913.21/193,111.39 = 88,916.00/x
3. Step 3: Cross multiply
   139,913.21x = 193,111.39 × 88,916.00
4. Step 4: Simplify right side
   139,913.21x = 17,170,691,498.83
5. Step 5: Solve for x
   x = 17,170,691,498.83/139,913.21
6. Step 6: Final answer
   x = 122,723.88