Finding the Fourth Proportional to 153,173.61, 211,348.34 and 89,499.09

Step by Step Solution

1. Step 1: Write the proportion equation
   153,173.61 : 211,348.34 = 89,499.09 : x
2. Step 2: Convert to fraction form
   153,173.61/211,348.34 = 89,499.09/x
3. Step 3: Cross multiply
   153,173.61x = 211,348.34 × 89,499.09
4. Step 4: Simplify right side
   153,173.61x = 18,915,483,655.52
5. Step 5: Solve for x
   x = 18,915,483,655.52/153,173.61
6. Step 6: Final answer
   x = 123,490.49