Finding the Fourth Proportional to 156,160, 215,500.80 and 89,090.56

Step by Step Solution

1. Step 1: Write the proportion equation
   156,160 : 215,500.80 = 89,090.56 : x
2. Step 2: Convert to fraction form
   156,160/215,500.80 = 89,090.56/x
3. Step 3: Cross multiply
   156,160x = 215,500.80 × 89,090.56
4. Step 4: Simplify right side
   156,160x = 19,199,086,952.45
5. Step 5: Solve for x
   x = 19,199,086,952.45/156,160
6. Step 6: Final answer
   x = 122,944.97