Finding the Fourth Proportional to 90,068.34, 135,087.15 and 30,090.02

Step by Step Solution

1. Step 1: Write the proportion equation
   90,068.34 : 135,087.15 = 30,090.02 : x
2. Step 2: Convert to fraction form
   90,068.34/135,087.15 = 30,090.02/x
3. Step 3: Cross multiply
   90,068.34x = 135,087.15 × 30,090.02
4. Step 4: Simplify right side
   90,068.34x = 4,064,774,369.81
5. Step 5: Solve for x
   x = 4,064,774,369.81/90,068.34
6. Step 6: Final answer
   x = 45,129.89