Finding the Fourth Proportional to 428,643.60, 642,992.14 and 113,100.82

Step by Step Solution

1. Step 1: Write the proportion equation
   428,643.60 : 642,992.14 = 113,100.82 : x
2. Step 2: Convert to fraction form
   428,643.60/642,992.14 = 113,100.82/x
3. Step 3: Cross multiply
   428,643.60x = 642,992.14 × 113,100.82
4. Step 4: Simplify right side
   428,643.60x = 72,722,938,287.55
5. Step 5: Solve for x
   x = 72,722,938,287.55/428,643.60
6. Step 6: Final answer
   x = 169,658.29