Finding the Fourth Proportional to 111,233.86, 153,528.01 and 86,987.01

Step by Step Solution

1. Step 1: Write the proportion equation
   111,233.86 : 153,528.01 = 86,987.01 : x
2. Step 2: Convert to fraction form
   111,233.86/153,528.01 = 86,987.01/x
3. Step 3: Cross multiply
   111,233.86x = 153,528.01 × 86,987.01
4. Step 4: Simplify right side
   111,233.86x = 13,354,942,899.41
5. Step 5: Solve for x
   x = 13,354,942,899.41/111,233.86
6. Step 6: Final answer
   x = 120,061.85