Finding the Fourth Proportional to 380,082.96, 570,128.76 and 99,628.56

Step by Step Solution

1. Step 1: Write the proportion equation
   380,082.96 : 570,128.76 = 99,628.56 : x
2. Step 2: Convert to fraction form
   380,082.96/570,128.76 = 99,628.56/x
3. Step 3: Cross multiply
   380,082.96x = 570,128.76 × 99,628.56
4. Step 4: Simplify right side
   380,082.96x = 56,801,107,373.39
5. Step 5: Solve for x
   x = 56,801,107,373.39/380,082.96
6. Step 6: Final answer
   x = 149,443.97