Finding the Fourth Proportional to 93,111.60, 139,275.96 and 78,491.50

Step by Step Solution

1. Step 1: Write the proportion equation
   93,111.60 : 139,275.96 = 78,491.50 : x
2. Step 2: Convert to fraction form
   93,111.60/139,275.96 = 78,491.50/x
3. Step 3: Cross multiply
   93,111.60x = 139,275.96 × 78,491.50
4. Step 4: Simplify right side
   93,111.60x = 10,931,979,014.34
5. Step 5: Solve for x
   x = 10,931,979,014.34/93,111.60
6. Step 6: Final answer
   x = 117,407.27