Finding the Fourth Proportional to 498,381.30, 747,111.42 and 198,789

Step by Step Solution

1. Step 1: Write the proportion equation
   498,381.30 : 747,111.42 = 198,789 : x
2. Step 2: Convert to fraction form
   498,381.30/747,111.42 = 198,789/x
3. Step 3: Cross multiply
   498,381.30x = 747,111.42 × 198,789
4. Step 4: Simplify right side
   498,381.30x = 148,517,532,070.38
5. Step 5: Solve for x
   x = 148,517,532,070.38/498,381.30
6. Step 6: Final answer
   x = 297,999.81