Finding the Fourth Proportional to 139,317.17, 192,210.72 and 84,888.20

Step by Step Solution

1. Step 1: Write the proportion equation
   139,317.17 : 192,210.72 = 84,888.20 : x
2. Step 2: Convert to fraction form
   139,317.17/192,210.72 = 84,888.20/x
3. Step 3: Cross multiply
   139,317.17x = 192,210.72 × 84,888.20
4. Step 4: Simplify right side
   139,317.17x = 16,316,422,681.20
5. Step 5: Solve for x
   x = 16,316,422,681.20/139,317.17
6. Step 6: Final answer
   x = 117,117.10