Finding the Fourth Proportional to 152,978.48, 211,080.49 and 89,318.96

Step by Step Solution

1. Step 1: Write the proportion equation
   152,978.48 : 211,080.49 = 89,318.96 : x
2. Step 2: Convert to fraction form
   152,978.48/211,080.49 = 89,318.96/x
3. Step 3: Cross multiply
   152,978.48x = 211,080.49 × 89,318.96
4. Step 4: Simplify right side
   152,978.48x = 18,853,488,564.39
5. Step 5: Solve for x
   x = 18,853,488,564.39/152,978.48
6. Step 6: Final answer
   x = 123,242.75