Finding the Fourth Proportional to 56,684.31, 84,526.38 and 56,178.42

Step by Step Solution

1. Step 1: Write the proportion equation
   56,684.31 : 84,526.38 = 56,178.42 : x
2. Step 2: Convert to fraction form
   56,684.31/84,526.38 = 56,178.42/x
3. Step 3: Cross multiply
   56,684.31x = 84,526.38 × 56,178.42
4. Step 4: Simplify right side
   56,684.31x = 4,748,558,594.98
5. Step 5: Solve for x
   x = 4,748,558,594.98/56,684.31
6. Step 6: Final answer
   x = 83,772.00