Finding the Fourth Proportional to 101,130.50, 139,560.15 and 56,418.50

Step by Step Solution

1. Step 1: Write the proportion equation
   101,130.50 : 139,560.15 = 56,418.50 : x
2. Step 2: Convert to fraction form
   101,130.50/139,560.15 = 56,418.50/x
3. Step 3: Cross multiply
   101,130.50x = 139,560.15 × 56,418.50
4. Step 4: Simplify right side
   101,130.50x = 7,873,774,322.78
5. Step 5: Solve for x
   x = 7,873,774,322.78/101,130.50
6. Step 6: Final answer
   x = 77,857.56