Finding the Fourth Proportional to 89,390.80, 123,307.76 and 53,560.05

Step by Step Solution

1. Step 1: Write the proportion equation
   89,390.80 : 123,307.76 = 53,560.05 : x
2. Step 2: Convert to fraction form
   89,390.80/123,307.76 = 53,560.05/x
3. Step 3: Cross multiply
   89,390.80x = 123,307.76 × 53,560.05
4. Step 4: Simplify right side
   89,390.80x = 6,604,369,428.76
5. Step 5: Solve for x
   x = 6,604,369,428.76/89,390.80
6. Step 6: Final answer
   x = 73,881.98