Finding the Fourth Proportional to 57,560.03, 78,857.54 and 55,402.76

Step by Step Solution

1. Step 1: Write the proportion equation
   57,560.03 : 78,857.54 = 55,402.76 : x
2. Step 2: Convert to fraction form
   57,560.03/78,857.54 = 55,402.76/x
3. Step 3: Cross multiply
   57,560.03x = 78,857.54 × 55,402.76
4. Step 4: Simplify right side
   57,560.03x = 4,368,925,282.94
5. Step 5: Solve for x
   x = 4,368,925,282.94/57,560.03
6. Step 6: Final answer
   x = 75,902.06