Finding the Fourth Proportional to 266,553.72, 399,851.61 and 89,061.34

Step by Step Solution

1. Step 1: Write the proportion equation
   266,553.72 : 399,851.61 = 89,061.34 : x
2. Step 2: Convert to fraction form
   266,553.72/399,851.61 = 89,061.34/x
3. Step 3: Cross multiply
   266,553.72x = 399,851.61 × 89,061.34
4. Step 4: Simplify right side
   266,553.72x = 35,611,320,187.76
5. Step 5: Solve for x
   x = 35,611,320,187.76/266,553.72
6. Step 6: Final answer
   x = 133,599.04