Finding the Fourth Proportional to 102,688.03, 141,706.71 and 56,119.06

Step by Step Solution

1. Step 1: Write the proportion equation
   102,688.03 : 141,706.71 = 56,119.06 : x
2. Step 2: Convert to fraction form
   102,688.03/141,706.71 = 56,119.06/x
3. Step 3: Cross multiply
   102,688.03x = 141,706.71 × 56,119.06
4. Step 4: Simplify right side
   102,688.03x = 7,952,447,360.89
5. Step 5: Solve for x
   x = 7,952,447,360.89/102,688.03
6. Step 6: Final answer
   x = 77,442.79