Finding the Fourth Proportional to 621,123.40, 931,684.38 and 194,662.12

Step by Step Solution

1. Step 1: Write the proportion equation
   621,123.40 : 931,684.38 = 194,662.12 : x
2. Step 2: Convert to fraction form
   621,123.40/931,684.38 = 194,662.12/x
3. Step 3: Cross multiply
   621,123.40x = 931,684.38 × 194,662.12
4. Step 4: Simplify right side
   621,123.40x = 181,363,656,581.69
5. Step 5: Solve for x
   x = 181,363,656,581.69/621,123.40
6. Step 6: Final answer
   x = 291,992.95