Finding the Fourth Proportional to 72,499.98, 100,054.98 and 40,670.94

Step by Step Solution

1. Step 1: Write the proportion equation
   72,499.98 : 100,054.98 = 40,670.94 : x
2. Step 2: Convert to fraction form
   72,499.98/100,054.98 = 40,670.94/x
3. Step 3: Cross multiply
   72,499.98x = 100,054.98 × 40,670.94
4. Step 4: Simplify right side
   72,499.98x = 4,069,330,088.28
5. Step 5: Solve for x
   x = 4,069,330,088.28/72,499.98
6. Step 6: Final answer
   x = 56,128.71