Finding the Fourth Proportional to 85,897.16, 128,895.98 and 35,973.06

Step by Step Solution

1. Step 1: Write the proportion equation
   85,897.16 : 128,895.98 = 35,973.06 : x
2. Step 2: Convert to fraction form
   85,897.16/128,895.98 = 35,973.06/x
3. Step 3: Cross multiply
   85,897.16x = 128,895.98 × 35,973.06
4. Step 4: Simplify right side
   85,897.16x = 4,636,782,642.43
5. Step 5: Solve for x
   x = 4,636,782,642.43/85,897.16
6. Step 6: Final answer
   x = 53,980.63