Finding the Fourth Proportional to 280,499,419.48, 387,081,773.40 and 156,741,113.56

Step by Step Solution

1. Step 1: Write the proportion equation
   280,499,419.48 : 387,081,773.40 = 156,741,113.56 : x
2. Step 2: Convert to fraction form
   280,499,419.48/387,081,773.40 = 156,741,113.56/x
3. Step 3: Cross multiply
   280,499,419.48x = 387,081,773.40 × 156,741,113.56
4. Step 4: Simplify right side
   280,499,419.48x = 60,671,628,201,495,584
5. Step 5: Solve for x
   x = 60,671,628,201,495,584/280,499,419.48
6. Step 6: Final answer
   x = 216,298,587.41