Finding the Fourth Proportional to 60,579.99, 83,424 and 47,128.59

Step by Step Solution

1. Step 1: Write the proportion equation
   60,579.99 : 83,424 = 47,128.59 : x
2. Step 2: Convert to fraction form
   60,579.99/83,424 = 47,128.59/x
3. Step 3: Cross multiply
   60,579.99x = 83,424 × 47,128.59
4. Step 4: Simplify right side
   60,579.99x = 3,931,655,492.16
5. Step 5: Solve for x
   x = 3,931,655,492.16/60,579.99
6. Step 6: Final answer
   x = 64,900.23