Finding the Fourth Proportional to 56,667.16, 84,836.51 and 42,686.05

Step by Step Solution

1. Step 1: Write the proportion equation
   56,667.16 : 84,836.51 = 42,686.05 : x
2. Step 2: Convert to fraction form
   56,667.16/84,836.51 = 42,686.05/x
3. Step 3: Cross multiply
   56,667.16x = 84,836.51 × 42,686.05
4. Step 4: Simplify right side
   56,667.16x = 3,621,335,507.69
5. Step 5: Solve for x
   x = 3,621,335,507.69/56,667.16
6. Step 6: Final answer
   x = 63,905.36