Finding the Fourth Proportional to 102,146.47, 140,904.52 and 61,300.15

Step by Step Solution

1. Step 1: Write the proportion equation
   102,146.47 : 140,904.52 = 61,300.15 : x
2. Step 2: Convert to fraction form
   102,146.47/140,904.52 = 61,300.15/x
3. Step 3: Cross multiply
   102,146.47x = 140,904.52 × 61,300.15
4. Step 4: Simplify right side
   102,146.47x = 8,637,467,706.17
5. Step 5: Solve for x
   x = 8,637,467,706.17/102,146.47
6. Step 6: Final answer
   x = 84,559.63