Finding the Fourth Proportional to 127,989.90, 191,989.71 and 49,112.10

Step by Step Solution

1. Step 1: Write the proportion equation
   127,989.90 : 191,989.71 = 49,112.10 : x
2. Step 2: Convert to fraction form
   127,989.90/191,989.71 = 49,112.10/x
3. Step 3: Cross multiply
   127,989.90x = 191,989.71 × 49,112.10
4. Step 4: Simplify right side
   127,989.90x = 9,429,017,836.49
5. Step 5: Solve for x
   x = 9,429,017,836.49/127,989.90
6. Step 6: Final answer
   x = 73,670.01