Finding the Fourth Proportional to 175,366.56, 263,196.76 and 91,178.40

Step by Step Solution

1. Step 1: Write the proportion equation
   175,366.56 : 263,196.76 = 91,178.40 : x
2. Step 2: Convert to fraction form
   175,366.56/263,196.76 = 91,178.40/x
3. Step 3: Cross multiply
   175,366.56x = 263,196.76 × 91,178.40
4. Step 4: Simplify right side
   175,366.56x = 23,997,859,461.98
5. Step 5: Solve for x
   x = 23,997,859,461.98/175,366.56
6. Step 6: Final answer
   x = 136,843.99