Finding the Fourth Proportional to 127,036.46, 190,628.50 and 56,915.78

Step by Step Solution

1. Step 1: Write the proportion equation
   127,036.46 : 190,628.50 = 56,915.78 : x
2. Step 2: Convert to fraction form
   127,036.46/190,628.50 = 56,915.78/x
3. Step 3: Cross multiply
   127,036.46x = 190,628.50 × 56,915.78
4. Step 4: Simplify right side
   127,036.46x = 10,849,769,767.73
5. Step 5: Solve for x
   x = 10,849,769,767.73/127,036.46
6. Step 6: Final answer
   x = 85,406.74