Finding the Fourth Proportional to 90,561.21, 135,665.10 and 59,301.69

Step by Step Solution

1. Step 1: Write the proportion equation
   90,561.21 : 135,665.10 = 59,301.69 : x
2. Step 2: Convert to fraction form
   90,561.21/135,665.10 = 59,301.69/x
3. Step 3: Cross multiply
   90,561.21x = 135,665.10 × 59,301.69
4. Step 4: Simplify right side
   90,561.21x = 8,045,169,407.51
5. Step 5: Solve for x
   x = 8,045,169,407.51/90,561.21
6. Step 6: Final answer
   x = 88,836.81