Finding the Fourth Proportional to 78,100.37, 117,151.99 and 28,184.21

Step by Step Solution

1. Step 1: Write the proportion equation
   78,100.37 : 117,151.99 = 28,184.21 : x
2. Step 2: Convert to fraction form
   78,100.37/117,151.99 = 28,184.21/x
3. Step 3: Cross multiply
   78,100.37x = 117,151.99 × 28,184.21
4. Step 4: Simplify right side
   78,100.37x = 3,301,835,631.86
5. Step 5: Solve for x
   x = 3,301,835,631.86/78,100.37
6. Step 6: Final answer
   x = 42,276.83