Finding the Fourth Proportional to 89,275.84, 123,210.36 and 57,039.91

Step by Step Solution

1. Step 1: Write the proportion equation
   89,275.84 : 123,210.36 = 57,039.91 : x
2. Step 2: Convert to fraction form
   89,275.84/123,210.36 = 57,039.91/x
3. Step 3: Cross multiply
   89,275.84x = 123,210.36 × 57,039.91
4. Step 4: Simplify right side
   89,275.84x = 7,027,907,845.47
5. Step 5: Solve for x
   x = 7,027,907,845.47/89,275.84
6. Step 6: Final answer
   x = 78,721.27