Finding the Fourth Proportional to 209,004.30, 288,422.78 and 113,510.16

Step by Step Solution

1. Step 1: Write the proportion equation
   209,004.30 : 288,422.78 = 113,510.16 : x
2. Step 2: Convert to fraction form
   209,004.30/288,422.78 = 113,510.16/x
3. Step 3: Cross multiply
   209,004.30x = 288,422.78 × 113,510.16
4. Step 4: Simplify right side
   209,004.30x = 32,738,915,337.89
5. Step 5: Solve for x
   x = 32,738,915,337.89/209,004.30
6. Step 6: Final answer
   x = 156,642.31