Finding the Fourth Proportional to 93,153.17, 128,636.78 and 59,172.61

Step by Step Solution

1. Step 1: Write the proportion equation
   93,153.17 : 128,636.78 = 59,172.61 : x
2. Step 2: Convert to fraction form
   93,153.17/128,636.78 = 59,172.61/x
3. Step 3: Cross multiply
   93,153.17x = 128,636.78 × 59,172.61
4. Step 4: Simplify right side
   93,153.17x = 7,611,773,075.55
5. Step 5: Solve for x
   x = 7,611,773,075.55/93,153.17
6. Step 6: Final answer
   x = 81,712.44