Finding the Fourth Proportional to 345,614.50, 476,948.01 and 186,638.50

Step by Step Solution

1. Step 1: Write the proportion equation
   345,614.50 : 476,948.01 = 186,638.50 : x
2. Step 2: Convert to fraction form
   345,614.50/476,948.01 = 186,638.50/x
3. Step 3: Cross multiply
   345,614.50x = 476,948.01 × 186,638.50
4. Step 4: Simplify right side
   345,614.50x = 89,016,861,164.39
5. Step 5: Solve for x
   x = 89,016,861,164.39/345,614.50
6. Step 6: Final answer
   x = 257,561.13