Finding the Fourth Proportional to 152,191.53, 209,976.71 and 91,780.65

Step by Step Solution

1. Step 1: Write the proportion equation
   152,191.53 : 209,976.71 = 91,780.65 : x
2. Step 2: Convert to fraction form
   152,191.53/209,976.71 = 91,780.65/x
3. Step 3: Cross multiply
   152,191.53x = 209,976.71 × 91,780.65
4. Step 4: Simplify right side
   152,191.53x = 19,271,798,469.76
5. Step 5: Solve for x
   x = 19,271,798,469.76/152,191.53
6. Step 6: Final answer
   x = 126,628.59