Finding the Fourth Proportional to 60,802, 91,128.12 and 43,176.40

Step by Step Solution

1. Step 1: Write the proportion equation
   60,802 : 91,128.12 = 43,176.40 : x
2. Step 2: Convert to fraction form
   60,802/91,128.12 = 43,176.40/x
3. Step 3: Cross multiply
   60,802x = 91,128.12 × 43,176.40
4. Step 4: Simplify right side
   60,802x = 3,934,584,160.37
5. Step 5: Solve for x
   x = 3,934,584,160.37/60,802
6. Step 6: Final answer
   x = 64,711.43