Finding the Fourth Proportional to 90,588.72, 135,751.83 and 51,061.71

Step by Step Solution

1. Step 1: Write the proportion equation
   90,588.72 : 135,751.83 = 51,061.71 : x
2. Step 2: Convert to fraction form
   90,588.72/135,751.83 = 51,061.71/x
3. Step 3: Cross multiply
   90,588.72x = 135,751.83 × 51,061.71
4. Step 4: Simplify right side
   90,588.72x = 6,931,720,575.43
5. Step 5: Solve for x
   x = 6,931,720,575.43/90,588.72
6. Step 6: Final answer
   x = 76,518.58