Finding the Fourth Proportional to 104,005.34, 143,445.74 and 89,688.86

Step by Step Solution

1. Step 1: Write the proportion equation
   104,005.34 : 143,445.74 = 89,688.86 : x
2. Step 2: Convert to fraction form
   104,005.34/143,445.74 = 89,688.86/x
3. Step 3: Cross multiply
   104,005.34x = 143,445.74 × 89,688.86
4. Step 4: Simplify right side
   104,005.34x = 12,865,484,892.46
5. Step 5: Solve for x
   x = 12,865,484,892.46/104,005.34
6. Step 6: Final answer
   x = 123,700.23