Finding the Fourth Proportional to 155,629.62, 214,705.89 and 99,030.42

Step by Step Solution

1. Step 1: Write the proportion equation
   155,629.62 : 214,705.89 = 99,030.42 : x
2. Step 2: Convert to fraction form
   155,629.62/214,705.89 = 99,030.42/x
3. Step 3: Cross multiply
   155,629.62x = 214,705.89 × 99,030.42
4. Step 4: Simplify right side
   155,629.62x = 21,262,414,463.17
5. Step 5: Solve for x
   x = 21,262,414,463.17/155,629.62
6. Step 6: Final answer
   x = 136,621.90