Finding the Fourth Proportional to 98,501.76, 135,916.60 and 56,061

Step by Step Solution

1. Step 1: Write the proportion equation
   98,501.76 : 135,916.60 = 56,061 : x
2. Step 2: Convert to fraction form
   98,501.76/135,916.60 = 56,061/x
3. Step 3: Cross multiply
   98,501.76x = 135,916.60 × 56,061
4. Step 4: Simplify right side
   98,501.76x = 7,619,620,512.60
5. Step 5: Solve for x
   x = 7,619,620,512.60/98,501.76
6. Step 6: Final answer
   x = 77,355.17