Finding the Fourth Proportional to 162,978.99, 224,911.52 and 90,387.06

Step by Step Solution

1. Step 1: Write the proportion equation
   162,978.99 : 224,911.52 = 90,387.06 : x
2. Step 2: Convert to fraction form
   162,978.99/224,911.52 = 90,387.06/x
3. Step 3: Cross multiply
   162,978.99x = 224,911.52 × 90,387.06
4. Step 4: Simplify right side
   162,978.99x = 20,329,089,476.44
5. Step 5: Solve for x
   x = 20,329,089,476.44/162,978.99
6. Step 6: Final answer
   x = 124,734.42