Finding the Fourth Proportional to 314,799.18, 472,131.42 and 90,099.27

Step by Step Solution

1. Step 1: Write the proportion equation
   314,799.18 : 472,131.42 = 90,099.27 : x
2. Step 2: Convert to fraction form
   314,799.18/472,131.42 = 90,099.27/x
3. Step 3: Cross multiply
   314,799.18x = 472,131.42 × 90,099.27
4. Step 4: Simplify right side
   314,799.18x = 42,538,695,948.19
5. Step 5: Solve for x
   x = 42,538,695,948.19/314,799.18
6. Step 6: Final answer
   x = 135,129.63