Finding the Fourth Proportional to 64,984.67, 89,627.88 and 42,330.79

Step by Step Solution

1. Step 1: Write the proportion equation
   64,984.67 : 89,627.88 = 42,330.79 : x
2. Step 2: Convert to fraction form
   64,984.67/89,627.88 = 42,330.79/x
3. Step 3: Cross multiply
   64,984.67x = 89,627.88 × 42,330.79
4. Step 4: Simplify right side
   64,984.67x = 3,794,018,966.43
5. Step 5: Solve for x
   x = 3,794,018,966.43/64,984.67
6. Step 6: Final answer
   x = 58,383.29