Finding the Fourth Proportional to 85,384.40, 127,905.12 and 42,560.69

Step by Step Solution

1. Step 1: Write the proportion equation
   85,384.40 : 127,905.12 = 42,560.69 : x
2. Step 2: Convert to fraction form
   85,384.40/127,905.12 = 42,560.69/x
3. Step 3: Cross multiply
   85,384.40x = 127,905.12 × 42,560.69
4. Step 4: Simplify right side
   85,384.40x = 5,443,729,522.21
5. Step 5: Solve for x
   x = 5,443,729,522.21/85,384.40
6. Step 6: Final answer
   x = 63,755.56