Finding the Fourth Proportional to 72,713.77, 100,312.20 and 42,485.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,713.77 : 100,312.20 = 42,485.50 : x
2. Step 2: Convert to fraction form
   72,713.77/100,312.20 = 42,485.50/x
3. Step 3: Cross multiply
   72,713.77x = 100,312.20 × 42,485.50
4. Step 4: Simplify right side
   72,713.77x = 4,261,813,973.10
5. Step 5: Solve for x
   x = 4,261,813,973.10/72,713.77
6. Step 6: Final answer
   x = 58,610.82