Finding the Fourth Proportional to 100,916.06, 139,264.17 and 56,204.06

Step by Step Solution

1. Step 1: Write the proportion equation
   100,916.06 : 139,264.17 = 56,204.06 : x
2. Step 2: Convert to fraction form
   100,916.06/139,264.17 = 56,204.06/x
3. Step 3: Cross multiply
   100,916.06x = 139,264.17 × 56,204.06
4. Step 4: Simplify right side
   100,916.06x = 7,827,212,114.69
5. Step 5: Solve for x
   x = 7,827,212,114.69/100,916.06
6. Step 6: Final answer
   x = 77,561.61