Finding the Fourth Proportional to 56,840.42, 78,410.91 and 43,388.30

Step by Step Solution

1. Step 1: Write the proportion equation
   56,840.42 : 78,410.91 = 43,388.30 : x
2. Step 2: Convert to fraction form
   56,840.42/78,410.91 = 43,388.30/x
3. Step 3: Cross multiply
   56,840.42x = 78,410.91 × 43,388.30
4. Step 4: Simplify right side
   56,840.42x = 3,402,116,086.35
5. Step 5: Solve for x
   x = 3,402,116,086.35/56,840.42
6. Step 6: Final answer
   x = 59,853.82