Finding the Fourth Proportional to 284,488.89, 392,602.59 and 157,172.69

Step by Step Solution

1. Step 1: Write the proportion equation
   284,488.89 : 392,602.59 = 157,172.69 : x
2. Step 2: Convert to fraction form
   284,488.89/392,602.59 = 157,172.69/x
3. Step 3: Cross multiply
   284,488.89x = 392,602.59 × 157,172.69
4. Step 4: Simplify right side
   284,488.89x = 61,706,405,171.27
5. Step 5: Solve for x
   x = 61,706,405,171.27/284,488.89
6. Step 6: Final answer
   x = 216,902.69