Finding the Fourth Proportional to 127,630.89, 191,446.38 and 57,428.19

Step by Step Solution

1. Step 1: Write the proportion equation
   127,630.89 : 191,446.38 = 57,428.19 : x
2. Step 2: Convert to fraction form
   127,630.89/191,446.38 = 57,428.19/x
3. Step 3: Cross multiply
   127,630.89x = 191,446.38 × 57,428.19
4. Step 4: Simplify right side
   127,630.89x = 10,994,419,085.45
5. Step 5: Solve for x
   x = 10,994,419,085.45/127,630.89
6. Step 6: Final answer
   x = 86,142.31