Finding the Fourth Proportional to 152,031.18, 209,859.40 and 91,605.18

Step by Step Solution

1. Step 1: Write the proportion equation
   152,031.18 : 209,859.40 = 91,605.18 : x
2. Step 2: Convert to fraction form
   152,031.18/209,859.40 = 91,605.18/x
3. Step 3: Cross multiply
   152,031.18x = 209,859.40 × 91,605.18
4. Step 4: Simplify right side
   152,031.18x = 19,224,208,111.69
5. Step 5: Solve for x
   x = 19,224,208,111.69/152,031.18
6. Step 6: Final answer
   x = 126,449.11