Finding the Fourth Proportional to 123,898.72, 170,990.64 and 70,200.80

Step by Step Solution

1. Step 1: Write the proportion equation
   123,898.72 : 170,990.64 = 70,200.80 : x
2. Step 2: Convert to fraction form
   123,898.72/170,990.64 = 70,200.80/x
3. Step 3: Cross multiply
   123,898.72x = 170,990.64 × 70,200.80
4. Step 4: Simplify right side
   123,898.72x = 12,003,679,720.51
5. Step 5: Solve for x
   x = 12,003,679,720.51/123,898.72
6. Step 6: Final answer
   x = 96,883.00