Finding the Fourth Proportional to 156,669.55, 216,181.16 and 89,588.59

Step by Step Solution

1. Step 1: Write the proportion equation
   156,669.55 : 216,181.16 = 89,588.59 : x
2. Step 2: Convert to fraction form
   156,669.55/216,181.16 = 89,588.59/x
3. Step 3: Cross multiply
   156,669.55x = 216,181.16 × 89,588.59
4. Step 4: Simplify right side
   156,669.55x = 19,367,365,308.96
5. Step 5: Solve for x
   x = 19,367,365,308.96/156,669.55
6. Step 6: Final answer
   x = 123,619.21