Finding the Fourth Proportional to 84,878, 117,131.72 and 47,155.76

Step by Step Solution

1. Step 1: Write the proportion equation
   84,878 : 117,131.72 = 47,155.76 : x
2. Step 2: Convert to fraction form
   84,878/117,131.72 = 47,155.76/x
3. Step 3: Cross multiply
   84,878x = 117,131.72 × 47,155.76
4. Step 4: Simplify right side
   84,878x = 5,523,435,276.71
5. Step 5: Solve for x
   x = 5,523,435,276.71/84,878
6. Step 6: Final answer
   x = 65,074.99