Finding the Fourth Proportional to 78,457.86, 108,272.46 and 42,647.88

Step by Step Solution

1. Step 1: Write the proportion equation
   78,457.86 : 108,272.46 = 42,647.88 : x
2. Step 2: Convert to fraction form
   78,457.86/108,272.46 = 42,647.88/x
3. Step 3: Cross multiply
   78,457.86x = 108,272.46 × 42,647.88
4. Step 4: Simplify right side
   78,457.86x = 4,617,590,881.38
5. Step 5: Solve for x
   x = 4,617,590,881.38/78,457.86
6. Step 6: Final answer
   x = 58,854.41