Finding the Fourth Proportional to 152,070.32, 209,838.72 and 84,078.12

Step by Step Solution

1. Step 1: Write the proportion equation
   152,070.32 : 209,838.72 = 84,078.12 : x
2. Step 2: Convert to fraction form
   152,070.32/209,838.72 = 84,078.12/x
3. Step 3: Cross multiply
   152,070.32x = 209,838.72 × 84,078.12
4. Step 4: Simplify right side
   152,070.32x = 17,642,845,080.81
5. Step 5: Solve for x
   x = 17,642,845,080.81/152,070.32
6. Step 6: Final answer
   x = 116,017.68