Finding the Fourth Proportional to 56,809.23, 78,538.46 and 42,637.47

Step by Step Solution

1. Step 1: Write the proportion equation
   56,809.23 : 78,538.46 = 42,637.47 : x
2. Step 2: Convert to fraction form
   56,809.23/78,538.46 = 42,637.47/x
3. Step 3: Cross multiply
   56,809.23x = 78,538.46 × 42,637.47
4. Step 4: Simplify right side
   56,809.23x = 3,348,681,018.91
5. Step 5: Solve for x
   x = 3,348,681,018.91/56,809.23
6. Step 6: Final answer
   x = 58,946.07