Finding the Fourth Proportional to 90,473.42, 135,583.71 and 77,076.62

Step by Step Solution

1. Step 1: Write the proportion equation
   90,473.42 : 135,583.71 = 77,076.62 : x
2. Step 2: Convert to fraction form
   90,473.42/135,583.71 = 77,076.62/x
3. Step 3: Cross multiply
   90,473.42x = 135,583.71 × 77,076.62
4. Step 4: Simplify right side
   90,473.42x = 10,450,334,093.86
5. Step 5: Solve for x
   x = 10,450,334,093.86/90,473.42
6. Step 6: Final answer
   x = 115,507.23