Finding the Fourth Proportional to 56,726.10, 78,389.97 and 42,554.34

Step by Step Solution

1. Step 1: Write the proportion equation
   56,726.10 : 78,389.97 = 42,554.34 : x
2. Step 2: Convert to fraction form
   56,726.10/78,389.97 = 42,554.34/x
3. Step 3: Cross multiply
   56,726.10x = 78,389.97 × 42,554.34
4. Step 4: Simplify right side
   56,726.10x = 3,335,833,435.97
5. Step 5: Solve for x
   x = 3,335,833,435.97/56,726.10
6. Step 6: Final answer
   x = 58,805.97