Finding the Fourth Proportional to 152,401.51, 210,317.47 and 86,989.01

Step by Step Solution

1. Step 1: Write the proportion equation
   152,401.51 : 210,317.47 = 86,989.01 : x
2. Step 2: Convert to fraction form
   152,401.51/210,317.47 = 86,989.01/x
3. Step 3: Cross multiply
   152,401.51x = 210,317.47 × 86,989.01
4. Step 4: Simplify right side
   152,401.51x = 18,295,308,809.33
5. Step 5: Solve for x
   x = 18,295,308,809.33/152,401.51
6. Step 6: Final answer
   x = 120,046.77