Finding the Fourth Proportional to 56,666.16, 84,835.01 and 42,685.05

Step by Step Solution

1. Step 1: Write the proportion equation
   56,666.16 : 84,835.01 = 42,685.05 : x
2. Step 2: Convert to fraction form
   56,666.16/84,835.01 = 42,685.05/x
3. Step 3: Cross multiply
   56,666.16x = 84,835.01 × 42,685.05
4. Step 4: Simplify right side
   56,666.16x = 3,621,186,643.60
5. Step 5: Solve for x
   x = 3,621,186,643.60/56,666.16
6. Step 6: Final answer
   x = 63,903.87