Finding the Fourth Proportional to 102,801.30, 153,971.55 and 61,329.30

Step by Step Solution

1. Step 1: Write the proportion equation
   102,801.30 : 153,971.55 = 61,329.30 : x
2. Step 2: Convert to fraction form
   102,801.30/153,971.55 = 61,329.30/x
3. Step 3: Cross multiply
   102,801.30x = 153,971.55 × 61,329.30
4. Step 4: Simplify right side
   102,801.30x = 9,442,967,381.42
5. Step 5: Solve for x
   x = 9,442,967,381.42/102,801.30
6. Step 6: Final answer
   x = 91,856.50