Finding the Fourth Proportional to 156,109.50, 215,431.11 and 89,041.50

Step by Step Solution

1. Step 1: Write the proportion equation
   156,109.50 : 215,431.11 = 89,041.50 : x
2. Step 2: Convert to fraction form
   156,109.50/215,431.11 = 89,041.50/x
3. Step 3: Cross multiply
   156,109.50x = 215,431.11 × 89,041.50
4. Step 4: Simplify right side
   156,109.50x = 19,182,309,181.07
5. Step 5: Solve for x
   x = 19,182,309,181.07/156,109.50
6. Step 6: Final answer
   x = 122,877.27