Finding the Fourth Proportional to 100,772, 139,065.36 and 56,060

Step by Step Solution

1. Step 1: Write the proportion equation
   100,772 : 139,065.36 = 56,060 : x
2. Step 2: Convert to fraction form
   100,772/139,065.36 = 56,060/x
3. Step 3: Cross multiply
   100,772x = 139,065.36 × 56,060
4. Step 4: Simplify right side
   100,772x = 7,796,004,081.60
5. Step 5: Solve for x
   x = 7,796,004,081.60/100,772
6. Step 6: Final answer
   x = 77,362.80