Finding the Fourth Proportional to 74,773.78, 103,189.50 and 42,503.28

Step by Step Solution

1. Step 1: Write the proportion equation
   74,773.78 : 103,189.50 = 42,503.28 : x
2. Step 2: Convert to fraction form
   74,773.78/103,189.50 = 42,503.28/x
3. Step 3: Cross multiply
   74,773.78x = 103,189.50 × 42,503.28
4. Step 4: Simplify right side
   74,773.78x = 4,385,892,211.56
5. Step 5: Solve for x
   x = 4,385,892,211.56/74,773.78
6. Step 6: Final answer
   x = 58,655.48