Finding the Fourth Proportional to 72,926.72, 109,280.73 and 56,261.78

Step by Step Solution

1. Step 1: Write the proportion equation
   72,926.72 : 109,280.73 = 56,261.78 : x
2. Step 2: Convert to fraction form
   72,926.72/109,280.73 = 56,261.78/x
3. Step 3: Cross multiply
   72,926.72x = 109,280.73 × 56,261.78
4. Step 4: Simplify right side
   72,926.72x = 6,148,328,389.50
5. Step 5: Solve for x
   x = 6,148,328,389.50/72,926.72
6. Step 6: Final answer
   x = 84,308.31