Finding the Fourth Proportional to 152,308, 210,155.88 and 98,585.56

Step by Step Solution

1. Step 1: Write the proportion equation
   152,308 : 210,155.88 = 98,585.56 : x
2. Step 2: Convert to fraction form
   152,308/210,155.88 = 98,585.56/x
3. Step 3: Cross multiply
   152,308x = 210,155.88 × 98,585.56
4. Step 4: Simplify right side
   152,308x = 20,718,335,117.09
5. Step 5: Solve for x
   x = 20,718,335,117.09/152,308
6. Step 6: Final answer
   x = 136,029.20