Finding the Fourth Proportional to 83,070.50, 124,478.15 and 56,381.81

Step by Step Solution

1. Step 1: Write the proportion equation
   83,070.50 : 124,478.15 = 56,381.81 : x
2. Step 2: Convert to fraction form
   83,070.50/124,478.15 = 56,381.81/x
3. Step 3: Cross multiply
   83,070.50x = 124,478.15 × 56,381.81
4. Step 4: Simplify right side
   83,070.50x = 7,018,302,498.15
5. Step 5: Solve for x
   x = 7,018,302,498.15/83,070.50
6. Step 6: Final answer
   x = 84,486.10