Finding the Fourth Proportional to 90,667.91, 136,024.94 and 53,259.62

Step by Step Solution

1. Step 1: Write the proportion equation
   90,667.91 : 136,024.94 = 53,259.62 : x
2. Step 2: Convert to fraction form
   90,667.91/136,024.94 = 53,259.62/x
3. Step 3: Cross multiply
   90,667.91x = 136,024.94 × 53,259.62
4. Step 4: Simplify right side
   90,667.91x = 7,244,636,348.62
5. Step 5: Solve for x
   x = 7,244,636,348.62/90,667.91
6. Step 6: Final answer
   x = 79,902.98