Finding the Fourth Proportional to 428,522.51, 642,827.54 and 148,003.31

Step by Step Solution

1. Step 1: Write the proportion equation
   428,522.51 : 642,827.54 = 148,003.31 : x
2. Step 2: Convert to fraction form
   428,522.51/642,827.54 = 148,003.31/x
3. Step 3: Cross multiply
   428,522.51x = 642,827.54 × 148,003.31
4. Step 4: Simplify right side
   428,522.51x = 95,140,605,656.23
5. Step 5: Solve for x
   x = 95,140,605,656.23/428,522.51
6. Step 6: Final answer
   x = 222,020.09