Finding the Fourth Proportional to 108,490.42, 149,684.39 and 70,189.30

Step by Step Solution

1. Step 1: Write the proportion equation
   108,490.42 : 149,684.39 = 70,189.30 : x
2. Step 2: Convert to fraction form
   108,490.42/149,684.39 = 70,189.30/x
3. Step 3: Cross multiply
   108,490.42x = 149,684.39 × 70,189.30
4. Step 4: Simplify right side
   108,490.42x = 10,506,242,555.03
5. Step 5: Solve for x
   x = 10,506,242,555.03/108,490.42
6. Step 6: Final answer
   x = 96,840.28