Finding the Fourth Proportional to 117,131.88, 175,513.86 and 90,543

Step by Step Solution

1. Step 1: Write the proportion equation
   117,131.88 : 175,513.86 = 90,543 : x
2. Step 2: Convert to fraction form
   117,131.88/175,513.86 = 90,543/x
3. Step 3: Cross multiply
   117,131.88x = 175,513.86 × 90,543
4. Step 4: Simplify right side
   117,131.88x = 15,891,551,425.98
5. Step 5: Solve for x
   x = 15,891,551,425.98/117,131.88
6. Step 6: Final answer
   x = 135,672.30