Finding the Fourth Proportional to 101,018.68, 139,410.54 and 56,307

Step by Step Solution

1. Step 1: Write the proportion equation
   101,018.68 : 139,410.54 = 56,307 : x
2. Step 2: Convert to fraction form
   101,018.68/139,410.54 = 56,307/x
3. Step 3: Cross multiply
   101,018.68x = 139,410.54 × 56,307
4. Step 4: Simplify right side
   101,018.68x = 7,849,789,275.78
5. Step 5: Solve for x
   x = 7,849,789,275.78/101,018.68
6. Step 6: Final answer
   x = 77,706.31