Finding the Fourth Proportional to 102,134.17, 140,953.67 and 56,820.69

Step by Step Solution

1. Step 1: Write the proportion equation
   102,134.17 : 140,953.67 = 56,820.69 : x
2. Step 2: Convert to fraction form
   102,134.17/140,953.67 = 56,820.69/x
3. Step 3: Cross multiply
   102,134.17x = 140,953.67 × 56,820.69
4. Step 4: Simplify right side
   102,134.17x = 8,009,084,787.43
5. Step 5: Solve for x
   x = 8,009,084,787.43/102,134.17
6. Step 6: Final answer
   x = 78,417.29