Finding the Fourth Proportional to 102,971.72, 142,058.72 and 62,653.16

Step by Step Solution

1. Step 1: Write the proportion equation
   102,971.72 : 142,058.72 = 62,653.16 : x
2. Step 2: Convert to fraction form
   102,971.72/142,058.72 = 62,653.16/x
3. Step 3: Cross multiply
   102,971.72x = 142,058.72 × 62,653.16
4. Step 4: Simplify right side
   102,971.72x = 8,900,427,713.56
5. Step 5: Solve for x
   x = 8,900,427,713.56/102,971.72
6. Step 6: Final answer
   x = 86,435.65