Finding the Fourth Proportional to 89,275.99, 133,951.56 and 55,570.20

Step by Step Solution

1. Step 1: Write the proportion equation
   89,275.99 : 133,951.56 = 55,570.20 : x
2. Step 2: Convert to fraction form
   89,275.99/133,951.56 = 55,570.20/x
3. Step 3: Cross multiply
   89,275.99x = 133,951.56 × 55,570.20
4. Step 4: Simplify right side
   89,275.99x = 7,443,714,979.51
5. Step 5: Solve for x
   x = 7,443,714,979.51/89,275.99
6. Step 6: Final answer
   x = 83,378.69