Finding the Fourth Proportional to 102,307.05, 153,404.98 and 54,978.55

Step by Step Solution

1. Step 1: Write the proportion equation
   102,307.05 : 153,404.98 = 54,978.55 : x
2. Step 2: Convert to fraction form
   102,307.05/153,404.98 = 54,978.55/x
3. Step 3: Cross multiply
   102,307.05x = 153,404.98 × 54,978.55
4. Step 4: Simplify right side
   102,307.05x = 8,433,983,363.18
5. Step 5: Solve for x
   x = 8,433,983,363.18/102,307.05
6. Step 6: Final answer
   x = 82,437.95