Finding the Fourth Proportional to 93,250.72, 128,705.88 and 61,422.40

Step by Step Solution

1. Step 1: Write the proportion equation
   93,250.72 : 128,705.88 = 61,422.40 : x
2. Step 2: Convert to fraction form
   93,250.72/128,705.88 = 61,422.40/x
3. Step 3: Cross multiply
   93,250.72x = 128,705.88 × 61,422.40
4. Step 4: Simplify right side
   93,250.72x = 7,905,424,043.71
5. Step 5: Solve for x
   x = 7,905,424,043.71/93,250.72
6. Step 6: Final answer
   x = 84,776.01