Finding the Fourth Proportional to 347,196.90, 478,938.81 and 201,986.37

Step by Step Solution

1. Step 1: Write the proportion equation
   347,196.90 : 478,938.81 = 201,986.37 : x
2. Step 2: Convert to fraction form
   347,196.90/478,938.81 = 201,986.37/x
3. Step 3: Cross multiply
   347,196.90x = 478,938.81 × 201,986.37
4. Step 4: Simplify right side
   347,196.90x = 96,739,111,684.02
5. Step 5: Solve for x
   x = 96,739,111,684.02/347,196.90
6. Step 6: Final answer
   x = 278,628.96