Finding the Fourth Proportional to 153,572.16, 211,857.12 and 89,870.52

Step by Step Solution

1. Step 1: Write the proportion equation
   153,572.16 : 211,857.12 = 89,870.52 : x
2. Step 2: Convert to fraction form
   153,572.16/211,857.12 = 89,870.52/x
3. Step 3: Cross multiply
   153,572.16x = 211,857.12 × 89,870.52
4. Step 4: Simplify right side
   153,572.16x = 19,039,709,540.10
5. Step 5: Solve for x
   x = 19,039,709,540.10/153,572.16
6. Step 6: Final answer
   x = 123,978.91