Finding the Fourth Proportional to 138,100.86, 190,593.81 and 84,417.30

Step by Step Solution

1. Step 1: Write the proportion equation
   138,100.86 : 190,593.81 = 84,417.30 : x
2. Step 2: Convert to fraction form
   138,100.86/190,593.81 = 84,417.30/x
3. Step 3: Cross multiply
   138,100.86x = 190,593.81 × 84,417.30
4. Step 4: Simplify right side
   138,100.86x = 16,089,414,836.91
5. Step 5: Solve for x
   x = 16,089,414,836.91/138,100.86
6. Step 6: Final answer
   x = 116,504.81