Finding the Fourth Proportional to 139,025.36, 191,828.28 and 88,002.20

Step by Step Solution

1. Step 1: Write the proportion equation
   139,025.36 : 191,828.28 = 88,002.20 : x
2. Step 2: Convert to fraction form
   139,025.36/191,828.28 = 88,002.20/x
3. Step 3: Cross multiply
   139,025.36x = 191,828.28 × 88,002.20
4. Step 4: Simplify right side
   139,025.36x = 16,881,310,662.22
5. Step 5: Solve for x
   x = 16,881,310,662.22/139,025.36
6. Step 6: Final answer
   x = 121,426.12