Finding the Fourth Proportional to 93,111.35, 139,275.59 and 78,491.25

Step by Step Solution

1. Step 1: Write the proportion equation
   93,111.35 : 139,275.59 = 78,491.25 : x
2. Step 2: Convert to fraction form
   93,111.35/139,275.59 = 78,491.25/x
3. Step 3: Cross multiply
   93,111.35x = 139,275.59 × 78,491.25
4. Step 4: Simplify right side
   93,111.35x = 10,931,914,761.13
5. Step 5: Solve for x
   x = 10,931,914,761.13/93,111.35
6. Step 6: Final answer
   x = 117,406.90