Finding the Fourth Proportional to 100,784.16, 139,087.89 and 57,770.82

Step by Step Solution

1. Step 1: Write the proportion equation
   100,784.16 : 139,087.89 = 57,770.82 : x
2. Step 2: Convert to fraction form
   100,784.16/139,087.89 = 57,770.82/x
3. Step 3: Cross multiply
   100,784.16x = 139,087.89 × 57,770.82
4. Step 4: Simplify right side
   100,784.16x = 8,035,221,457.37
5. Step 5: Solve for x
   x = 8,035,221,457.37/100,784.16
6. Step 6: Final answer
   x = 79,727.03