Finding the Fourth Proportional to 78,493.75, 117,772.06 and 28,577.30

Step by Step Solution

1. Step 1: Write the proportion equation
   78,493.75 : 117,772.06 = 28,577.30 : x
2. Step 2: Convert to fraction form
   78,493.75/117,772.06 = 28,577.30/x
3. Step 3: Cross multiply
   78,493.75x = 117,772.06 × 28,577.30
4. Step 4: Simplify right side
   78,493.75x = 3,365,606,901.38
5. Step 5: Solve for x
   x = 3,365,606,901.38/78,493.75
6. Step 6: Final answer
   x = 42,877.39