Finding the Fourth Proportional to 102,667.19, 141,679.23 and 57,345.83

Step by Step Solution

1. Step 1: Write the proportion equation
   102,667.19 : 141,679.23 = 57,345.83 : x
2. Step 2: Convert to fraction form
   102,667.19/141,679.23 = 57,345.83/x
3. Step 3: Cross multiply
   102,667.19x = 141,679.23 × 57,345.83
4. Step 4: Simplify right side
   102,667.19x = 8,124,713,038.11
5. Step 5: Solve for x
   x = 8,124,713,038.11/102,667.19
6. Step 6: Final answer
   x = 79,136.41