Finding the Fourth Proportional to 423,513.30, 634,233.15 and 201,638.10

Step by Step Solution

1. Step 1: Write the proportion equation
   423,513.30 : 634,233.15 = 201,638.10 : x
2. Step 2: Convert to fraction form
   423,513.30/634,233.15 = 201,638.10/x
3. Step 3: Cross multiply
   423,513.30x = 634,233.15 × 201,638.10
4. Step 4: Simplify right side
   423,513.30x = 127,885,567,323.02
5. Step 5: Solve for x
   x = 127,885,567,323.02/423,513.30
6. Step 6: Final answer
   x = 301,963.52