Finding the Fourth Proportional to 156,991.08, 216,643.12 and 89,014.56

Step by Step Solution

1. Step 1: Write the proportion equation
   156,991.08 : 216,643.12 = 89,014.56 : x
2. Step 2: Convert to fraction form
   156,991.08/216,643.12 = 89,014.56/x
3. Step 3: Cross multiply
   156,991.08x = 216,643.12 × 89,014.56
4. Step 4: Simplify right side
   156,991.08x = 19,284,392,003.83
5. Step 5: Solve for x
   x = 19,284,392,003.83/156,991.08
6. Step 6: Final answer
   x = 122,837.50