Finding the Fourth Proportional to 78,906.78, 108,899.88 and 48,691.32

Step by Step Solution

1. Step 1: Write the proportion equation
   78,906.78 : 108,899.88 = 48,691.32 : x
2. Step 2: Convert to fraction form
   78,906.78/108,899.88 = 48,691.32/x
3. Step 3: Cross multiply
   78,906.78x = 108,899.88 × 48,691.32
4. Step 4: Simplify right side
   78,906.78x = 5,302,478,905.04
5. Step 5: Solve for x
   x = 5,302,478,905.04/78,906.78
6. Step 6: Final answer
   x = 67,199.28